I tried to search for them but it difficult as there quiet a lot of them that have alt-right videos. Also I’m not multilingual and only know English which few instance are a different language.
Videos I like watching: -
Linux
FOSS review/showcase
Gaming (such as Fallout NV, Minecraft, Resident Evil etc.)
diode.zone is awesome. The host is really cool, and she has done a good job at federating only with instances who don’t allow that kinda content.