The poster only mentioned two things. So you answer just makes me think you just don't admire commercial chess sites!
To take the video lessons, chess.com are clearly leagues ahead of lichess. They can pay the contributors to produce quality productions. You can't really open source the time of experts .
Isn't all open source built from the time of experts? (Not experts in chess, but in programming, design, etc) :)
I mean in theory, nothing prevent a professional chess player to make a nice video lesson and share it for free. And there is no reason to assume this video would not be as good as videos made for money (just like it's the case for software)
The only benefit I ever got from Lichess is that it’s open source which is nice.