That ain't goshi, that's morote gari aka clean double leg slam. Finished with juji gatame.
It started off as a reap but morote keels them over like a tree. This perp got turned into a projectile, ha. My use of the term goshi was approximate. The presence of concrete is more my point really, the slam the other part. Technique involved to deliver said slam is less important.
Though when you waffle someone like that it's kanuki gatame time, just my $0.02. I like how he was out like a bat in the night. No hate, no shit talkin. 'You guys got it? Great, later.'