Some MP4s can't be played in browser #324

Describe the bug
Some MP4 files can't be played in the browser while others work. Shows a blank screen but audio can be heard.

To Reproduce
Steps to reproduce the behavior:

1. Go play MP4 file
2. Doesn't play.

Expected behavior
MP4 videos should play.

Screenshots

Desktop (please complete the following information):
Windows 10

Smartphone (please complete the following information):
OnePlus 13, Android 16. Latest verison.

Additional context
I also noticed that small MP4 files can be played fine (so far for me up to around 8-9MB). But larger MP4 files will only have audio playing (anything 40MB ish and over for me).