I’m a big believer in long tailed keywords. I think they had a lot to do with my success over at ezinearticles, and I think they are powerful over at youtube. The thing is, the more competition, the more valuable the long tailed keyword become, in fact, I believe that long tailed keywords create an opportunity for you to show google that you deserve higher rankings across the board. Meaning that strong conversions on multiple videos spread google-love to other videos.
Anyhow, just my 2 cents . . ..
here is a short video I created to show you an obscure example:
Hope this is helpful,