No yeah that part was perplexing. I'd be surprised by SF guys youtubing it, but then again, everyone wants to be a star these days.
There's an SF vid out there where a guy is firing an old recoilless rifle, and is knocked on his backside when he does. They do put some stuff up.
I'm thinking they're SEALs, since I've seen a fair number pictures over the years with them wearing old camo. Or maybe this video is from the early 2000s?