"YouTube - Broadcast Yourself"

I uploaded my first video on YouTube today - I uploaded it as an mp4 (oooh now you can watch it on a video iPod) so the quality of the video leaves something to be desired. I know the sites I have been frequenting heavily this summer - blogger, myspace, and youtube - still raise a lot of questions for me in terms of the affordances they seemingly provide for the people who use them, the modes of expression they seem to promote, and the sticky business of who or what entities own these sites (particularly with the purchase of myspace by Rupert Murdoch and the subsequent EVIL changes in its user agreement), and in turn, how they set up the relationship between the formal structure of the site and the content that individuals provide for it. Somehow all these questions can't seen to quash my compulsion to keep adding crappy, self-centered content to all three sites...