You could try Lyricing: http://store.hfxe.com the script will grab the music video by searching the band name and song name in youtube, i.e. when you add a song/lyric it will search youtube for BAND - SONG NAME.
I custom developed www.videocafe.us. By typing in the youtube url, it will grab the FLV and 3 image previews and display them on your site. This can easily be edited to work with only music videos - and you could make it so only you can add videos. Please PM me if you are interested, I would give you a great deal on this script.
I have several types of music video codes scripts. you can see music2luv.com, lyricreminder.com, playsound.org, for examples. send me a pm if you are interested or want to see more.