Most people I know who have xanga, who put media files on their blog, use
Geocities to host their media files so I would try there. Of course, they use music files, which may or may not make a difference. I don't know Geocities enough to know which files they accept or don't accept. One host I DO know that accepts video files, unless they've changed, is
Topcities. Topcities has a lot more space also.