Here's a site. It describes something I wanted to do / did half a year ago but made no blog-post of it.
What I originally wanted to do was to have a single image as a video, and put some music to it and post it on youtube.
I somehow managed it, but I have no idea anymore how.
And I also found mp3tube, so I don't really need this anymore, if I don't care to have a special picture for my music.