I have 2 mods that do that.
This mod you need a
hypster.com account but it's free so you can make a video playlist
e360 - Hypster Video Playlist for Member Profile.
This one is a mp3 player from
grooveshark.com you also need an account it's free also so you can make a mp3 list
e360 - GrooveShark Playlist this one i would have to update because it don't have usergroup permissions.