Lemmy doesn’t really support embedding videos yet. It’s a highly requested feature so i think we can be assured it’ll be here within a future update.

Try swapping on the Compact view in settings. That might be more what you’re looking for

Alternative to Youtube. A lot of youtube creators advertise it since they get more out of it and aren’t under youtube’s guidelines. It’s a 5 dollsr a month thing iirc, but you could do something like CuriosityStream + Nebula for 15 a year.