Due to the Digital Millennium Copyright Act of 1996 and the anti-circumvention provisions connected to this act, there is no legal way to view music videos in a way not provided by company who distributes it.
Youtube does not hold the rights to any music videos, except the right to distribute those files who are uploaded. Vemo has contracts with some providers of music, aswell as independant artists.
helping someone find pirated copies would be considered a breach of the DMCA and punishable by death, well not death but a large fine.