It's the sort of thing that I'm surprised people don't create more often, but Plywood Fiend has created a WC music video featuring footage from WC3 extracted using HCl's movie player with Tourniquet by Evanescence for the video's music. It's slightly fuzzy due to the low resolution of the original videos, but that aside it's an interesting piece. You can download the 6 meg file here.
If you're interested in movie videos, the only similar work that I've been able to find was released almost exactly two years ago here. Perhaps this will inspire people to make more.