Answer:

Yes, but make sure you have permission! Please be aware that everything
you upload goes into your portfolio. So you really need to post only stuff
that is suitable for your own portfolio. If the work is a
collaboration, please include clearly in the body of  the posting, the
names of the other artists in the mp3,  video or  photo. If some of the
other collaborators have their own portfolios on this site, be sure to
spell their name exactly as it is in their portfolio. That way the name
will  become a link which when clicked, brings the user to information
about them and their own portfolio. Remember to give credit where
credit is due. Good karma goes a long way!