diff --git a/test/parameters.json b/test/parameters.json
index 8544f1ab2..bc4561374 100644
--- a/test/parameters.json
+++ b/test/parameters.json
@@ -9,7 +9,7 @@
     "forcetitle": false,
     "forceurl": false,
     "force_write_download_archive": false,
-    "format": "best",
+    "format": "b/bv",
     "ignoreerrors": false,
     "listformats": null,
     "logtostderr": false,
diff --git a/yt_dlp/extractor/atresplayer.py b/yt_dlp/extractor/atresplayer.py
index 8143eb4d7..6d843966a 100644
--- a/yt_dlp/extractor/atresplayer.py
+++ b/yt_dlp/extractor/atresplayer.py
@@ -24,9 +24,6 @@ class AtresPlayerIE(InfoExtractor):
                 'description': 'md5:7634cdcb4d50d5381bedf93efb537fbc',
                 'duration': 3413,
             },
-            'params': {
-                'format': 'bestvideo',
-            },
             'skip': 'This video is only available for registered users'
         },
         {
diff --git a/yt_dlp/extractor/bandaichannel.py b/yt_dlp/extractor/bandaichannel.py
index d67285913..f1bcdef7a 100644
--- a/yt_dlp/extractor/bandaichannel.py
+++ b/yt_dlp/extractor/bandaichannel.py
@@ -21,7 +21,6 @@ class BandaiChannelIE(BrightcoveNewIE):
             'duration': 1387.733,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }]
diff --git a/yt_dlp/extractor/corus.py b/yt_dlp/extractor/corus.py
index 352951e20..119461375 100644
--- a/yt_dlp/extractor/corus.py
+++ b/yt_dlp/extractor/corus.py
@@ -55,7 +55,6 @@ class CorusIE(ThePlatformFeedIE):
             'timestamp': 1486392197,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
         'expected_warnings': ['Failed to parse JSON'],
diff --git a/yt_dlp/extractor/curiositystream.py b/yt_dlp/extractor/curiositystream.py
index 034a5c92a..41c0f845a 100644
--- a/yt_dlp/extractor/curiositystream.py
+++ b/yt_dlp/extractor/curiositystream.py
@@ -59,7 +59,6 @@ class CuriosityStreamIE(CuriosityStreamBaseIE):
             'description': 'Vint Cerf, Google\'s Chief Internet Evangelist, describes how he and Bob Kahn created the internet.',
         },
         'params': {
-            'format': 'bestvideo',
             # m3u8 download
             'skip_download': True,
         },
diff --git a/yt_dlp/extractor/discoverynetworks.py b/yt_dlp/extractor/discoverynetworks.py
index f43c87160..4f8bdf0b9 100644
--- a/yt_dlp/extractor/discoverynetworks.py
+++ b/yt_dlp/extractor/discoverynetworks.py
@@ -19,7 +19,6 @@ class DiscoveryNetworksDeIE(DPlayIE):
             'upload_date': '20190331',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/discoveryplusindia.py b/yt_dlp/extractor/discoveryplusindia.py
index 51801402c..8ec418a97 100644
--- a/yt_dlp/extractor/discoveryplusindia.py
+++ b/yt_dlp/extractor/discoveryplusindia.py
@@ -28,7 +28,6 @@ class DiscoveryPlusIndiaIE(DPlayIE):
             'creator': 'Discovery Channel',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
         'skip': 'Cookies (not necessarily logged in) are needed'
diff --git a/yt_dlp/extractor/dplay.py b/yt_dlp/extractor/dplay.py
index d62480810..525c8e243 100644
--- a/yt_dlp/extractor/dplay.py
+++ b/yt_dlp/extractor/dplay.py
@@ -46,7 +46,6 @@ class DPlayIE(InfoExtractor):
             'episode_number': 1,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
@@ -67,7 +66,6 @@ class DPlayIE(InfoExtractor):
             'episode_number': 1,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
@@ -87,7 +85,6 @@ class DPlayIE(InfoExtractor):
             'episode_number': 7,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
         'skip': 'Available for Premium users',
@@ -313,9 +310,6 @@ class HGTVDeIE(DPlayIE):
             'season_number': 3,
             'episode_number': 3,
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }]
 
     def _real_extract(self, url):
diff --git a/yt_dlp/extractor/egghead.py b/yt_dlp/extractor/egghead.py
index f6b50e7c2..b6b86768c 100644
--- a/yt_dlp/extractor/egghead.py
+++ b/yt_dlp/extractor/egghead.py
@@ -86,7 +86,6 @@ class EggheadLessonIE(EggheadBaseIE):
         },
         'params': {
             'skip_download': True,
-            'format': 'bestvideo',
         },
     }, {
         'url': 'https://egghead.io/api/v1/lessons/react-add-redux-to-a-react-application',
diff --git a/yt_dlp/extractor/fancode.py b/yt_dlp/extractor/fancode.py
index 912feb702..f6733b124 100644
--- a/yt_dlp/extractor/fancode.py
+++ b/yt_dlp/extractor/fancode.py
@@ -21,7 +21,6 @@ class FancodeVodIE(InfoExtractor):
         'url': 'https://fancode.com/video/15043/match-preview-pbks-vs-mi',
         'params': {
             'skip_download': True,
-            'format': 'bestvideo'
         },
         'info_dict': {
             'id': '6249806281001',
diff --git a/yt_dlp/extractor/generic.py b/yt_dlp/extractor/generic.py
index 0d279016b..26f9497f1 100644
--- a/yt_dlp/extractor/generic.py
+++ b/yt_dlp/extractor/generic.py
@@ -359,9 +359,6 @@ class GenericIE(InfoExtractor):
                 'formats': 'mincount:9',
                 'upload_date': '20130904',
             },
-            'params': {
-                'format': 'bestvideo',
-            },
         },
         # m3u8 served with Content-Type: audio/x-mpegURL; charset=utf-8
         {
diff --git a/yt_dlp/extractor/internazionale.py b/yt_dlp/extractor/internazionale.py
index 676e8e269..45e2af690 100644
--- a/yt_dlp/extractor/internazionale.py
+++ b/yt_dlp/extractor/internazionale.py
@@ -20,9 +20,6 @@ class InternazionaleIE(InfoExtractor):
             'upload_date': '20150219',
             'thumbnail': r're:^https?://.*\.jpg$',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         'url': 'https://www.internazionale.it/video/2018/08/29/telefono-stare-con-noi-stessi',
         'md5': '9db8663704cab73eb972d1cee0082c79',
@@ -36,9 +33,6 @@ class InternazionaleIE(InfoExtractor):
             'upload_date': '20180829',
             'thumbnail': r're:^https?://.*\.jpg$',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }]
 
     def _real_extract(self, url):
diff --git a/yt_dlp/extractor/kinopoisk.py b/yt_dlp/extractor/kinopoisk.py
index 9e8d01f53..cdbb642e2 100644
--- a/yt_dlp/extractor/kinopoisk.py
+++ b/yt_dlp/extractor/kinopoisk.py
@@ -23,9 +23,6 @@ class KinoPoiskIE(InfoExtractor):
             'duration': 4533,
             'age_limit': 12,
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         'url': 'https://www.kinopoisk.ru/film/81041',
         'only_matching': True,
diff --git a/yt_dlp/extractor/n1.py b/yt_dlp/extractor/n1.py
index 75d63c893..fdb7f32db 100644
--- a/yt_dlp/extractor/n1.py
+++ b/yt_dlp/extractor/n1.py
@@ -88,7 +88,6 @@ class N1InfoIIE(InfoExtractor):
             'uploader': 'YouLotWhatDontStop',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/nexx.py b/yt_dlp/extractor/nexx.py
index 860d636e2..a30108483 100644
--- a/yt_dlp/extractor/nexx.py
+++ b/yt_dlp/extractor/nexx.py
@@ -427,7 +427,6 @@ class NexxEmbedIE(InfoExtractor):
             'upload_date': '20140305',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/nrl.py b/yt_dlp/extractor/nrl.py
index 22a2df8d3..0bd5086ae 100644
--- a/yt_dlp/extractor/nrl.py
+++ b/yt_dlp/extractor/nrl.py
@@ -16,7 +16,6 @@ class NRLTVIE(InfoExtractor):
         'params': {
             # m3u8 download
             'skip_download': True,
-            'format': 'bestvideo',
         },
     }
 
diff --git a/yt_dlp/extractor/olympics.py b/yt_dlp/extractor/olympics.py
index bca1f1928..0aad836fa 100644
--- a/yt_dlp/extractor/olympics.py
+++ b/yt_dlp/extractor/olympics.py
@@ -21,7 +21,6 @@ class OlympicsReplayIE(InfoExtractor):
             'description': 'md5:c66af4a5bc7429dbcc43d15845ff03b3',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/paramountplus.py b/yt_dlp/extractor/paramountplus.py
index 338b84d5b..17138985a 100644
--- a/yt_dlp/extractor/paramountplus.py
+++ b/yt_dlp/extractor/paramountplus.py
@@ -60,7 +60,6 @@ class ParamountPlusIE(CBSBaseIE):
         },
         'params': {
             'skip_download': 'm3u8',
-            'format': 'bestvideo',
         },
         'expected_warnings': ['Ignoring subtitle tracks'],  # TODO: Investigate this
     }, {
@@ -76,7 +75,6 @@ class ParamountPlusIE(CBSBaseIE):
         },
         'params': {
             'skip_download': 'm3u8',
-            'format': 'bestvideo',
         },
         'expected_warnings': ['Ignoring subtitle tracks'],
     }, {
diff --git a/yt_dlp/extractor/parliamentliveuk.py b/yt_dlp/extractor/parliamentliveuk.py
index 869ebd865..974d65482 100644
--- a/yt_dlp/extractor/parliamentliveuk.py
+++ b/yt_dlp/extractor/parliamentliveuk.py
@@ -25,9 +25,6 @@ class ParliamentLiveUKIE(InfoExtractor):
             'timestamp': 1395153872,
             'upload_date': '20140318',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         'url': 'http://parliamentlive.tv/event/index/3f24936f-130f-40bf-9a5d-b3d6479da6a4',
         'only_matching': True,
diff --git a/yt_dlp/extractor/peloton.py b/yt_dlp/extractor/peloton.py
index 287d341c9..7d832253f 100644
--- a/yt_dlp/extractor/peloton.py
+++ b/yt_dlp/extractor/peloton.py
@@ -203,7 +203,6 @@ class PelotonLiveIE(InfoExtractor):
             'chapters': 'count:3'
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': 'm3u8',
         },
         '_skip': 'Account needed'
diff --git a/yt_dlp/extractor/pornflip.py b/yt_dlp/extractor/pornflip.py
index d0aefa2dd..accf45269 100644
--- a/yt_dlp/extractor/pornflip.py
+++ b/yt_dlp/extractor/pornflip.py
@@ -29,7 +29,6 @@ class PornFlipIE(InfoExtractor):
                 'age_limit': 18,
             },
             'params': {
-                'format': 'bestvideo',
                 'skip_download': True,
             },
         },
diff --git a/yt_dlp/extractor/rcti.py b/yt_dlp/extractor/rcti.py
index 31d9779dd..19b2f451c 100644
--- a/yt_dlp/extractor/rcti.py
+++ b/yt_dlp/extractor/rcti.py
@@ -85,9 +85,6 @@ class RCTIPlusIE(RCTIPlusBaseIE):
             'series': 'iNews Malam',
             'channel': 'INews',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {  # Missed event/replay
         'url': 'https://www.rctiplus.com/missed-event/2507/mou-signing-ceremony-27-juli-2021-1400-wib',
         'md5': '649c5f27250faed1452ca8b91e06922d',
@@ -132,7 +129,6 @@ class RCTIPlusIE(RCTIPlusBaseIE):
         },
         'params': {
             'skip_download': True,
-            'format': 'bestvideo',
         },
     }]
     _CONVIVA_JSON_TEMPLATE = {
@@ -329,7 +325,6 @@ class RCTIPlusTVIE(RCTIPlusBaseIE):
         },
         'params': {
             'skip_download': True,
-            'format': 'bestvideo',
         }
     }, {
         # Returned video will always change
diff --git a/yt_dlp/extractor/reddit.py b/yt_dlp/extractor/reddit.py
index c75d95a8e..3ea750aeb 100644
--- a/yt_dlp/extractor/reddit.py
+++ b/yt_dlp/extractor/reddit.py
@@ -22,9 +22,6 @@ class RedditIE(InfoExtractor):
             'ext': 'mp4',
             'title': 'zv89llsvexdz',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }
 
     def _real_extract(self, url):
@@ -67,7 +64,6 @@ class RedditRIE(InfoExtractor):
             'age_limit': 0,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/rmcdecouverte.py b/yt_dlp/extractor/rmcdecouverte.py
index 422d47ae9..8bfce3416 100644
--- a/yt_dlp/extractor/rmcdecouverte.py
+++ b/yt_dlp/extractor/rmcdecouverte.py
@@ -26,7 +26,6 @@ class RMCDecouverteIE(InfoExtractor):
             'upload_date': '20210428',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/sevenplus.py b/yt_dlp/extractor/sevenplus.py
index 210c44ab2..9867961f0 100644
--- a/yt_dlp/extractor/sevenplus.py
+++ b/yt_dlp/extractor/sevenplus.py
@@ -35,7 +35,6 @@ class SevenPlusIE(BrightcoveNewIE):
             'episode': 'Wind Surf',
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         }
     }, {
diff --git a/yt_dlp/extractor/slideslive.py b/yt_dlp/extractor/slideslive.py
index 9409a0100..df6084647 100644
--- a/yt_dlp/extractor/slideslive.py
+++ b/yt_dlp/extractor/slideslive.py
@@ -35,9 +35,6 @@ class SlidesLiveIE(InfoExtractor):
             'ext': 'mp4',
             'title': 'Offline Reinforcement Learning: From Algorithms to Practical Challenges',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         # video_service_name = youtube
         'url': 'https://slideslive.com/38903721/magic-a-scientific-resurrection-of-an-esoteric-legend',
diff --git a/yt_dlp/extractor/svt.py b/yt_dlp/extractor/svt.py
index 38e0086b3..489f197fe 100644
--- a/yt_dlp/extractor/svt.py
+++ b/yt_dlp/extractor/svt.py
@@ -168,7 +168,6 @@ class SVTPlayIE(SVTPlayBaseIE):
             },
         },
         'params': {
-            'format': 'bestvideo',
             # skip for now due to download test asserts that segment is > 10000 bytes and svt uses
             # init segments that are smaller
             # AssertionError: Expected test_SVTPlay_jNwpV9P.mp4 to be at least 9.77KiB, but it's only 864.00B
diff --git a/yt_dlp/extractor/telequebec.py b/yt_dlp/extractor/telequebec.py
index 800d87b70..4bef2fe76 100644
--- a/yt_dlp/extractor/telequebec.py
+++ b/yt_dlp/extractor/telequebec.py
@@ -43,9 +43,6 @@ class TeleQuebecIE(TeleQuebecBaseIE):
             'uploader_id': '6150020952001',
             'upload_date': '20200512',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
         'add_ie': ['BrightcoveNew'],
     }, {
         'url': 'https://zonevideo.telequebec.tv/media/55267/le-soleil/passe-partout',
@@ -58,9 +55,6 @@ class TeleQuebecIE(TeleQuebecBaseIE):
             'upload_date': '20200625',
             'timestamp': 1593090307,
         },
-        'params': {
-            'format': 'bestvideo',
-        },
         'add_ie': ['BrightcoveNew'],
     }, {
         # no description
@@ -157,9 +151,6 @@ class TeleQuebecEmissionIE(InfoExtractor):
             'timestamp': 1588713424,
             'uploader_id': '6150020952001',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         'url': 'http://bancpublic.telequebec.tv/emissions/emission-49/31986/jeunes-meres-sous-pression',
         'only_matching': True,
@@ -220,9 +211,6 @@ class TeleQuebecVideoIE(TeleQuebecBaseIE):
             'timestamp': 1603115930,
             'uploader_id': '6101674910001',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         'url': 'https://video.telequebec.tv/player-live/28527',
         'only_matching': True,
diff --git a/yt_dlp/extractor/tf1.py b/yt_dlp/extractor/tf1.py
index 669eb5015..44785bc65 100644
--- a/yt_dlp/extractor/tf1.py
+++ b/yt_dlp/extractor/tf1.py
@@ -29,7 +29,6 @@ class TF1IE(InfoExtractor):
         'params': {
             # Sometimes wat serves the whole file with the --test option
             'skip_download': True,
-            'format': 'bestvideo',
         },
     }, {
         'url': 'http://www.tf1.fr/tf1/koh-lanta/videos/replay-koh-lanta-22-mai-2015.html',
diff --git a/yt_dlp/extractor/tvplay.py b/yt_dlp/extractor/tvplay.py
index fbafb41f8..9771d9108 100644
--- a/yt_dlp/extractor/tvplay.py
+++ b/yt_dlp/extractor/tvplay.py
@@ -369,7 +369,6 @@ class ViafreeIE(InfoExtractor):
             'upload_date': '20201217'
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True
         }
     }, {
diff --git a/yt_dlp/extractor/vice.py b/yt_dlp/extractor/vice.py
index ca4d3edbd..c8c30559e 100644
--- a/yt_dlp/extractor/vice.py
+++ b/yt_dlp/extractor/vice.py
@@ -290,7 +290,6 @@ class ViceArticleIE(ViceBaseIE):
         },
         'params': {
             'skip_download': True,
-            'format': 'bestvideo',
         },
         'add_ie': [ViceIE.ie_key()],
     }, {
diff --git a/yt_dlp/extractor/viki.py b/yt_dlp/extractor/viki.py
index acb5ae550..6a3c5532d 100644
--- a/yt_dlp/extractor/viki.py
+++ b/yt_dlp/extractor/viki.py
@@ -135,9 +135,6 @@ class VikiIE(VikiBaseIE):
             'uploader': 'FCC',
             'upload_date': '20201127',
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         'url': 'http://www.viki.com/videos/1023585v-heirs-episode-14',
         'info_dict': {
@@ -151,9 +148,6 @@ class VikiIE(VikiBaseIE):
             'duration': 3570,
             'episode_number': 14,
         },
-        'params': {
-            'format': 'bestvideo',
-        },
         'skip': 'Blocked in the US',
     }, {
         # clip
@@ -203,9 +197,6 @@ class VikiIE(VikiBaseIE):
             'age_limit': 13,
             'episode_number': 1,
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }, {
         # youtube external
         'url': 'http://www.viki.com/videos/50562v-poor-nastya-complete-episode-1',
@@ -241,9 +232,6 @@ class VikiIE(VikiBaseIE):
             'title': 'Love In Magic',
             'age_limit': 13,
         },
-        'params': {
-            'format': 'bestvideo',
-        },
     }]
 
     def _real_extract(self, url):
diff --git a/yt_dlp/extractor/wakanim.py b/yt_dlp/extractor/wakanim.py
index a61a630e2..a70a71961 100644
--- a/yt_dlp/extractor/wakanim.py
+++ b/yt_dlp/extractor/wakanim.py
@@ -25,7 +25,6 @@ class WakanimIE(InfoExtractor):
             'episode_number': 2,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
     }, {
diff --git a/yt_dlp/extractor/watchbox.py b/yt_dlp/extractor/watchbox.py
index 7469fe962..d19d80102 100644
--- a/yt_dlp/extractor/watchbox.py
+++ b/yt_dlp/extractor/watchbox.py
@@ -30,7 +30,6 @@ class WatchBoxIE(InfoExtractor):
             'release_year': 2009,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
         'expected_warnings': ['Failed to download m3u8 information'],
@@ -52,7 +51,6 @@ class WatchBoxIE(InfoExtractor):
             'episode_number': 1,
         },
         'params': {
-            'format': 'bestvideo',
             'skip_download': True,
         },
         'expected_warnings': ['Failed to download m3u8 information'],