The weird, wacky, zany and funny style videos win all the cake on Youtube. Sport videos do pretty OK, but those folks who go the extra distance to make extreme videos of all types are also the top eye candy there.
It's all about video quality, screen transitions for those less talented acts (Weeding and filtering out poorly recorded footage).
What I do there is tech and web stuff, but I been trying to merge my poetry from here and elsewhere onto it as well, which is a very tough nut to crack, mainly because I am not the best spoken word poet, plus I have some of the worst backgrounds for my video footage. My sports videos do well there, and nature videos as well. I also do health and cooking videos, they do OK too if you put up great image thumbnails to accompany each video, and use good keywords for the titles and video descriptions.
If you need more help don't hesitate to contact me on FB, I help folks all the time with Youtube, and other web related stuff Nell. Good luck and anyone can make it there, it just takes time and high quality videos with a flair of creativity in them if they're not the most funny types.