What I saw was someone in the woods speaking what I thought was Russian, practicing a gun dis-arm. I saw the gun loaded, one put into the chamber and then what looked like the safety engaged.
I saw the disarm with his thumb making it live.
Then I saw him make it "Safe" and hand it back and then do the next disarm, until he went to fire.
Now, not being an expert on weapons. I can make the assumptions that the thumb move to make it live on the first one was done on the real shooting (* Movement prevented seeing that one *) but making it safe again to hand back to the guy.
Having flown over some of the Russian and Siberian Forests, these woods and trees go on for days. There are no roads or very little, they travel by boat in some place. So, nto know exactly where they are, they could be safer than looks.
Yet, training like that might be a military thing, such as live fire training that occurs in some militaries.
I do not recommend nor support the video as it is, with no written comments of clear verbage telling people not to practice this at home, which would be the intent as the video was listed as a Systema Live Gun Disarm. So it could be the military working this, or it could be civilians. Either way, under those situations I still would not place this random video on the net. But that is me.
As to throwing the gun away he tossed it at the guy on the ground who had it originally. The toss was in contempt, which, to some is acceptable and to others is not. Me personally I would not, as it is in my hands and would keep it in case the bad guy had another clip.