diff --git a/static/videoUtils.js b/static/videoUtils.js
index d697e4a..6f3cd17 100644
--- a/static/videoUtils.js
+++ b/static/videoUtils.js
@@ -115,7 +115,7 @@ let ffmpeg = null;
     
                         var filename = toSlug(videoElement.parentNode.parentNode.id || document.title)
                         const data = await ffmpeg.readFile('output.mp4');
-                        saveAs(new Blob([data.buffer]),filename);
+                        saveAs(new Blob([data.buffer]),filename, {type: 'video/mp4'});
                         return
                     }
                     function saveAs(blob, filename) { // Yeah ok...