As for suing a commercial? I've not heard about that, but quite possible as Lisa has not been happy w/a couple of them that have been released.
And actually, you know what, let me clarify, if they did not want your video up, you would be contacted by one of their atty's. requesting you remove the content in question, they would give you so many days in which to do this and they would ask for proof of compliance. If you complied that would be the end of it, so don't let that comment scare you.
Also w/you being in England, due to the ruling in the case of elvislyyours I don't know what EPE's legal standing in England is?????? I also dont' know enough about youtube to know if there is a seperat sign up for those outside the U.S.?