I'm not sure the tube is a trend in the same way as the other trends mentioned. It's a distribution method not an actual difference in style or content of the videos. In years past the ramonesfans of the world came to the org. Now they go to the tube. Either way they're still making the same kind of videos they always were.
Personally I think it's a good thing. I have yet to see a good video on the tube that was not also on the org. I've seen many really bad videos on the tube that weren't on the org. So good riddance, I now have to sift through far less pure crap to get to the gems than I used to.
Also something else, I didn't quote all years. 2002 and earlier never broke the 10k mark. So what we're really seeing is a smallish fandom start, a huge spike, and now a return back to the levels it used to be. Which makes sense if you consider that anime became the popular in thing around then and now is slowly fading from the mainstream.
I don't think this means the 'eras' are over though. Things always change. Someday we'll look back and go 'remember when Naruto action vids used to be overdone?' kinda like how some of us now look back and go 'remember when everyone was sick of dancing vash and weird al?'. The declining # of vids doesn't mean the styles won't change. Hell, 2001 saw the start of several different, now common, styles and there were only 3857 videos released that year.








