Not exactly what you are looking for but: https://piefed.social/f/fediversevideos has a LOT of channels and communities (like our sister community at !peertube@lemmy.wtf). If your on piefed, you can subscribe to the feed.
https://peertube.wtf has quite a few instances but it can be a bit on the slow side. peertube has issues with a lot of federation once the servers get 1000+ sources. The videos are fine, its just finding the videos that continues to be the issues.