SOLVED: Audio but no video using Jellyfin Media Player

[Will]

I narrowed it down to a single file. In the folder "AppData\Local\Jellyfin Media Player\QtWebEngine\Default\Local Storage\leveldb" there's a file called "000003.log". If I delete that file and launch the media player again, it forces me to select a server and login again, but then video playback works until I close media player and open it again. It seems to be the only file that fixes the issue.

The really odd thing is that if I launch the media player after deleting that file, setup the server, and then close media player before I watch any videos, when I launch it again I'm back to a black screen. I don't even need to watch anything to break it.