Authentication Questions

I've used Google Video for quite some time, and have found live videos
of Radiohead, Muse, as well as music videos from Radiohead and Sublime.
These are well known bands. I HIGHLY HIGHLY doubt that
Radiohead/Sublime/Muse actually posted those videos up. I attempted to
upload several of my RHCP live songs/music videos, of all of them, only
a 2 minute clip of John Frusciante soloing made it on. Why? I own the
videos, their on my computer. Why were mine denied, but the ones I
mentioned earlier not?