diff --git a/README.md b/README.md
index 0c956f5..cc4870c 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@
 - Deals with any file formats (ncluding HEIC, HEVC)
 - Only updates changed files, runs incrementally
 - Uses relative paths (safe for using in subdirectory or S3)
+- Minimal bloat (no third party frontend libraries, minimal CSS)
 
 *Please note that fastgallery is still pre-alpha, I am actively working on it*
 
@@ -34,3 +35,8 @@ Then, for dependencies, install libvips42 for images and optionally ffmpeg (if y
 ## Roadmap
 
 For the prioritised roadmap, please see https://github.com/tonimelisma/fastgallery/projects/1
+
+## Third party libraries
+- (govips)[https://github.com/davidbyttow/govips], lightning fast image processing and resizing library
+- (Feather)[https://github.com/feathericons/feather] icons, simple and beautiful
+- (Primer)[https://github.com/primer/css] CSS, Github's in-house design system
\ No newline at end of file
diff --git a/cmd/fastgallery/main.go b/cmd/fastgallery/main.go
index 0ef05f9..c4598ff 100644
--- a/cmd/fastgallery/main.go
+++ b/cmd/fastgallery/main.go
@@ -16,6 +16,9 @@ import (
 	"github.com/davidbyttow/govips/v2/vips"
 )
 
+// assets
+const assetPlaybuttonImage = "/home/toni/go/src/github.com/tonimelisma/fastgallery/assets/playbutton.png"
+
 // global defaults
 const optSymlinkDir = "_original"
 const optFullsizeDir = "_pictures"
@@ -438,12 +441,30 @@ func resizeThumbnailVideo(source string, destination string) {
 	ffmpegCommand.Stdout = os.Stdout
 	ffmpegCommand.Stderr = os.Stderr
 
-	// TODO overlay triangle to thumbnail to implicate it's video instead of image
-
 	err := ffmpegCommand.Run()
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Could create thumbnail of video %s", source)
+		fmt.Fprintf(os.Stderr, "Could not create thumbnail of video %s", source)
 	}
+
+	// Take thumbnail and overlay triangle image on top of it
+
+	image, err := vips.NewImageFromFile(destination)
+	checkError(err)
+
+	// TODO don't load overlay separately
+	playbuttonOverlayImage, err := vips.NewImageFromFile(assetPlaybuttonImage)
+	checkError(err)
+
+	// overlay play button in the middle of thumbnail picture
+	err = image.Composite(playbuttonOverlayImage, vips.BlendModeSource, (thumbnailWidth/2)-(playbuttonOverlayImage.Width()/2), (thumbnailHeight/2)-(playbuttonOverlayImage.Height()/2))
+	checkError(err)
+
+	ep := vips.NewDefaultJPEGExportParams()
+	imageBytes, _, err := image.Export(ep)
+	checkError(err)
+
+	err = ioutil.WriteFile(destination, imageBytes, optFileMode)
+	checkError(err)
 }
 
 func resizeFullsizeVideo(source string, destination string) {
@@ -453,7 +474,7 @@ func resizeFullsizeVideo(source string, destination string) {
 
 	err := ffmpegCommand.Run()
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Could create full-size video of %s", source)
+		fmt.Fprintf(os.Stderr, "Could not create full-size video of %s", source)
 	}
 }
 
diff --git a/web/fastgallery.css b/web/fastgallery.css
index 78e23ba..360f5f5 100644
--- a/web/fastgallery.css
+++ b/web/fastgallery.css
@@ -9,7 +9,7 @@
 
 #modalHeader,
 #modalFooter {
-    width: 500px;
+    min-width: 300px;
 }
 
 .modalControl:hover,
diff --git a/web/template.html b/web/template.html
index 5765359..391851e 100644
--- a/web/template.html
+++ b/web/template.html
@@ -14,57 +14,81 @@
 
     <!-- Thumbnail view. First subfolders, then media. -->
     <div class="container-xl">
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0">
             <a href="temp2">
                 <img class="width-fit" src="_thumbnails/temp2/2018-10-14 15.59.20.jpg" alt="diipadaapa">
             </a>
             <span class="width-fit css-truncate css-truncate-target p-1">temp2</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(0);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(0);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-03-31 16.48.28.jpg" alt="2018-03-31 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-03-31 16.48.28.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(1);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(1);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-07-16 17.28.12 -000.jpg" alt="2018-03-31 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(2);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(2);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-11-10 12.36.05.jpg" alt="2018-11-10 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(3);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(3);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2016-05-01 18.20.21.jpg" alt="2016-05-01 18.20.21.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2016-05-01 18.20.21</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(0);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(0);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-03-31 16.48.28.jpg" alt="2018-03-31 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-03-31 16.48.28.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(1);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(1);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-07-16 17.28.12 -000.jpg" alt="2018-03-31 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(2);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(2);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-11-10 12.36.05.jpg" alt="2018-11-10 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(3);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(3);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2016-05-01 18.20.21.jpg" alt="2016-05-01 18.20.21.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2016-05-01 18.20.21</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(0);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(0);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-03-31 16.48.28.jpg" alt="2018-03-31 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-03-31 16.48.28.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(1);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(1);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-07-16 17.28.12 -000.jpg" alt="2018-03-31 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(2);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(2);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2018-11-10 12.36.05.jpg" alt="2018-11-10 16.48.28.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
         </div>
-        <div class="col-2 d-inline-block box border border-gray box-shadow m-3 p-0" onclick="changePicture(3);displayModal(true);">
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(0);displayModal(true);">
+            <img class="width-fit" src="_thumbnails/2018-03-31 16.48.28.jpg" alt="2018-03-31 16.48.28.jpg">
+            <span class="width-fit css-truncate css-truncate-target p-1">2018-03-31 16.48.28.jpg</span>
+        </div>
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(1);displayModal(true);">
+            <img class="width-fit" src="_thumbnails/2018-07-16 17.28.12 -000.jpg" alt="2018-03-31 16.48.28.jpg">
+            <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
+        </div>
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(2);displayModal(true);">
+            <img class="width-fit" src="_thumbnails/2018-11-10 12.36.05.jpg" alt="2018-11-10 16.48.28.jpg">
+            <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
+        </div>
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(0);displayModal(true);">
+            <img class="width-fit" src="_thumbnails/2018-03-31 16.48.28.jpg" alt="2018-03-31 16.48.28.jpg">
+            <span class="width-fit css-truncate css-truncate-target p-1">2018-03-31 16.48.28.jpg</span>
+        </div>
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(1);displayModal(true);">
+            <img class="width-fit" src="_thumbnails/2018-07-16 17.28.12 -000.jpg" alt="2018-03-31 16.48.28.jpg">
+            <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
+        </div>
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(2);displayModal(true);">
+            <img class="width-fit" src="_thumbnails/2018-11-10 12.36.05.jpg" alt="2018-11-10 16.48.28.jpg">
+            <span class="width-fit css-truncate css-truncate-target p-1">2018-07-16 17.28.12 -000.jpg</span>
+        </div>
+        <div class="col-sm-4 col-md-3 col-lg-2 d-inline-block box border border-gray box-shadow m-md-1 m-lg-2 p-0" onclick="changePicture(3);displayModal(true);">
             <img class="width-fit" src="_thumbnails/2016-05-01 18.20.21.jpg" alt="2016-05-01 18.20.21.jpg">
             <span class="width-fit css-truncate css-truncate-target p-1">2016-05-01 18.20.21</span>
         </div>
@@ -77,14 +101,14 @@
          fix order of header icons, picture height -->
     <div class="position-fixed top-0 left-0 width-full height-full d-flex flex-column flex-justify-center flex-items-center box border border-gray box-shadow p-0 bg-gray" id="modal" hidden>
         <div class="bg-gray clearfix position-absolute top-0 " id="modalHeader">
+            <div class="float-right modalControl d-inline-block" onclick="displayModal(false);">
+                <i data-feather="x"></i>
+            </div>
             <div class="float-right modalControl d-inline-block">
                 <a href="#" id="modalDownload" download>
                     <i data-feather="download"></i>
                 </a>
             </div>
-            <div class="float-right modalControl d-inline-block" onclick="displayModal(false);">
-                <i data-feather="x"></i>
-            </div>
         </div>
         <img id="modalPicture">
         <div class="bg-gray position-absolute bottom-0" id="modalFooter">