I was just stating that building a site like that is not as trivial as you made it out to be. Yes you "only" have some videos, but you also have views of said videos, and comments and rankings. Building different views of videos based on those factors is hard if you have lots and lots of this data points. Not to mention that you then have to (somewhere) display just some user's videos sorted by how they ware ranked, or maybe just some user's videos from some category based on number of views (which is not a simple INT field in the db). Etc etc etc.

What I'm saying is that there is more than it meets the eye.