There are a few videos on the internet that show long-range firing going almost deadly, when, supposedly, the shooter's own bullet ricochets at the target area, and comes flying back at the shooter.
Is it really possible?
Yes. Your own video shows it, and there are several others on YouTube that do. But for the sake of proving this...
Monan Jauhari, the Assistant directory of India's Central Forensic Science Laboratory wrote here about Bullet Ricochet from Metal Plates
A real life example from earlier this year; A Texas teen was killed by a ricochet when he shot a butane tank.
When you shoot a solid target, the bullet can deflect. If the target is angled properly, it can deflect back at you.