You gotta love the transitions from standing to prone, and the awesome forward and lateral rolls. This whole video reminds me of Ice Capades.
The tags in the video suggest that its Russian Spetsnaz (Russian Special Forces) training. Those guys definitely have some interesting methods, to say the least.
One thing I found very odd was the opening scene when the shooter has their finger on the trigger during the magazine change. Then proceeds to rack the slide with their finger still on the trigger.