I have a one of a kind, actually the only...Video from a club in Seattle of Nirvana and some other Sub-pop bands. It's awesome. A fight breaks out and Kurt gets off stage while Chris entertains singing beatles songs like "all you need is love". How can I sell it?
The two things you'll need are a mechanical license, which you'll pay for based on each copy of every song or portion thereof that you sell. You will also need to obtain a sync license, which is for the actual 'syncing' of the music to the video that you have. The sync license is a one-time fee, while the mechinicals are something you will pay per song, per download/sale.
Here's a video about sync:
and here is an article about mechanical licenses: http://is.gd/D5iN