There are many sites which let you create a customized audio playlists. Also I talked about Mixtube which lets you create an audio playlist from youtube videos. You can consider Plistube to be a video version of such sites. It lets you search for your favorite artist or band and automatically creates a video playlist featuring the best videos of that artist, most of them being YouTube videos.
It also shows more videos of the artist which can be easily added to your video playlist. You can also find and play the most popular playlists which have already been made by others.
Check out Plistube @ www.plistube.com