machinima and its benefit to music

I'd like to see some dialogue about an idea I thought of.  This idea was a result of one of Clint's posts:

http://myndflame.gameriot.com/blogs/Guide-me-plz/Blizzard-Machinima-Law-Part-3-Legal-Ways-to-use-Great-Music


We all have our favorite songs.  But the problem with using them in anything is you need to have a liscense from the copyright owner to do it.  Even if obtaining a liscense from the artist is possible, it may often take a very long time to gain approval, perhaps longer than one is willing to wait. 

While this is annoying, it made me think of the other artists without huge companies backing them.  It's hard for people to get their music out there without any sort of publicity, and this is where machinimists could help.  Making a good music video to one of those songs could greatly enhance their exposure, thus solving the copyright problem and the exposure problem. 

I'm probably not the only person to think of this.  But I'd like to hear what people think.