The best part of this is the channel doesn't pause when you flip away from it. It is always "running" and if you flip away you will miss it. That builds in a FOMO trade-off which causes user to automatically/subconciously decide on channel they most want to watch, because they can't watch everything.
In the intro to most shows/videos, there's annoying jingles, silly animations, a redundant summary of what's about to happen in an already short segment, or just useless chatter "hey guys! it's your boy, _. welcome to my channel, remember to smash that like button, we have a great show today".
Because of all this intro bloat, I tend to jump a few minutes into most YouTube videos by default.