Most don’t load for me. Just get a black screen. The ones I’ve checked were mp4s from imgur. Not sure if that accounts for all of them though.
Edit: I think it started after the most recent update. Edit 2: mp4s from catbox.moe also doesn’t work. It shows a spinner at the bottom but never loads.
Fyi, I just updated to the latest. I see this error and button now trying to load catbox.moe images (before, I was just seeing the image flash up for a split second and then a box icon with a zig zag through it would replace the image).