Lichess or Chess24?

lichess is THE best, period.

Both are great! I use Lichess for playing and Chess24 for some amazing video content

Yeah, the problem with Chess24 is that when it comes to internet, the recovery isn't as good as Lichess's own, that's one of the reasons why I prefer Lichess. Chess24 I personally think is a lot more challenging. The AI's you face, like the Computer Magnus Carlsen lol.

Chess24 is best when it comes to video library and otb tournament coverage.

Yeah.

Does someone play at chess24? I think it is mostly for tournament coverage. At WC match had pretty good show by them. I dont see these two sites really competing but offering two different services. And their ads: Does someone actually use internet without ad-blocker still?

My KID repertoire is based on van Kampen's video series and I got chess24's FFL shirt. That's all, my premium has runneth out.

Lichess is more popular than chess24. I played about one year ago, but I think so: lichess is the best :)
1st place Lichess
2nd place chess.com

Lichess is best for playing. Chess.com is best for content.