I dunno if this is what you're looking for, but I save the video, go onto a computer with the xbox ap, download video onto computer, the I can put video anywhere from there
Gamer tag: DasPanzerKat NA Xbox One
1300+ CP Battleground PvP'er
In case more clarification is needed, upload the specific clips to one drive on your xbox, then log on to one drive on the computer with your account info. From there you can save the clips to your computer for iMovie or whatever.