Cannot upload some user videos

I'm trying to upload a user video but I get the message "No copyrighted or obscene content are allowed".

The content is absolutely not obscene and the video isn't copyrighted as far as i'm concerned. How can I know it is?

Anyway... is there a way to upload it? It's a .MOV file...

Thanks.

Most likely because MOV isn't a supported file format.

The content is absolutely not obscene and the video isn't copyrighted as far as i'm concerned. How can I know it is?Tranceplant

Does it have watermarks on the image?

None.

Okay, i'll try to convert this movie into another type of format...

I converted the MOV into AVI and it still doesn't let me upload it!! WTF is wrong?

But MOV is in the supported type file list... I don't get it. Why it won't let me upload the movie?

EDIT: Okay... it worked with another movie... still doesn't work with the first one that i'm trying to upload... how can I know it's protected??