I see the progression of Youtube a bit differently. First it was dominated by *hot girls, Filthywhore would be an example, Emmalina another one. In amongst that you had stuff like Lonelygirl15, which I suppose could also fall into the hot girl category depending on what you think of Jessica Rose.
Then Youtube started sharing revenue with creators. Unfortunately for Youtube’s early popular creators, many of them had moved on and so missed the gravy train. Also, Youtube changed the way they counted viewers and subscribers, so some long time creators started whining about how the changes screwed them over. I say whining, because other creators were having no problems retaining or even growing their audience, so obviously the system was working fine. Just because at one point you had 150.000 viewers per video doesn’t mean EVERY video you upload must have 150.000 views or the system is broken. If you’re only seeing 50.000 viewers now per video, it means your videos have started to suck.
While all this was going on, Youtube’s growing presence attracted more and more content producers. These people were bringing in new ideas and new approaches. This is why things like Let’s Play videos took off.
Now here we are. What works on Youtube is known. You can do that, trying to get a foothold on Youtube. This is the equivalent of a tv network bringing out a new procedural in an attempt to try and grab some of the CSI audience. Or you can try something you feel like doing, even if you know it has limited appeal. Or you can try something new, in the hopes that there’s an audience for it.
It’s just like the progression of television.
*hot girls being a relative term and not involving sex or nudity, so we are talking lots of cleavage and maybe some dancing