What separates a successful game dev channel from one that just putters along never getting much attention?

I've seen some channels where they have decent content. The audio is fine. The game looks cool. They post new content regularly.

They never take off though.

Some popular ones are more flashy with good editing and more energy. Do I can understand why they took off. Others that are popular I don't really see a difference between them and the unpopular. Did one just get lucky with the algorithm? Do you think the cream rises to the top always if you stick with it? What do you think a successful channel needs to gain an audience?