diff --git a/youtube_dl/extractor/iprima.py b/youtube_dl/extractor/iprima.py
index dde482998..bf5e44d88 100644
--- a/youtube_dl/extractor/iprima.py
+++ b/youtube_dl/extractor/iprima.py
@@ -10,7 +10,7 @@
 
 
 class IPrimaIE(InfoExtractor):
-    _VALID_URL = r'https?://play\.iprima\.cz/(?P<videogroup>.+)/(?P<videoid>.+)'
+    _VALID_URL = r'https?://play\.iprima\.cz/[^?#]+/(?P<id>[^?#]+)'
 
     _TESTS = [{
         'url': 'http://play.iprima.cz/particka/particka-92',
@@ -29,7 +29,7 @@ class IPrimaIE(InfoExtractor):
 
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
-        video_id = mobj.group('videoid')
+        video_id = mobj.group('id')
 
         webpage = self._download_webpage(url, video_id)
 
@@ -44,18 +44,19 @@ def _real_extract(self, url):
         base_url = ''.join(re.findall(r"embed\['stream'\] = '(.+?)'.+'(\?auth=)'.+'(.+?)';", playerpage)[1])
 
         zoneGEO = self._html_search_regex(r'"zoneGEO":(.+?),', webpage, 'zoneGEO')
-
         if zoneGEO != '0':
-            base_url = base_url.replace('token', 'token_'+zoneGEO)
+            base_url = base_url.replace('token', 'token_' + zoneGEO)
 
         formats = []
         for format_id in ['lq', 'hq', 'hd']:
-            filename = self._html_search_regex(r'"%s_id":(.+?),' % format_id, webpage, 'filename')
+            filename = self._html_search_regex(
+                r'"%s_id":(.+?),' % format_id, webpage, 'filename')
 
             if filename == 'null':
                 continue
 
-            real_id = self._search_regex(r'Prima-[0-9]{10}-([0-9]+)_', filename, 'real video id')
+            real_id = self._search_regex(
+                r'Prima-[0-9]{10}-([0-9]+)_', filename, 'real video id')
 
             if format_id == 'lq':
                 quality = 0
@@ -63,13 +64,13 @@ def _real_extract(self, url):
                 quality = 1
             elif format_id == 'hd':
                 quality = 2
-                filename = 'hq/'+filename
+                filename = 'hq/' + filename
 
             formats.append({
                 'format_id': format_id,
                 'url': base_url,
                 'quality': quality,
-                'play_path': 'mp4:'+filename.replace('"', '')[:-4],
+                'play_path': 'mp4:' + filename.replace('"', '')[:-4],
                 'rtmp_live': True,
                 'ext': 'flv',
             })