Royalty free background videos needed

[xorinzor]

We need background videos that are royalty free (credits can be given within a readme, etc. but rather not watermarked on-screen).
These background videos need to match the BPM, and ideally can be slowed down or sped up to match BPM while not visually looking too weird.

The idea of these background videos is similar to Spotify's background videos. Just something that will match up with the music and provide visual ambiance.

Users will be able to upload their own videos too, but I'd like shoutz0r to contain a bunch of videos that can be freely distributed with installations of shoutzor.