TF2 GMV | Confident

This was a video from 07/06/2016. I have genuinely lost all of the files relating to the video, so I have no idea what the footage is. I do however know the song, as that's much easier to search up! Please, if anyone knows any of the clips, let me know. I've been asked very kindly to re-upload all my old videos, and even without proper credit to the original artists, I don't want to let my good friends down. Song - Confident, by Demi Lovato