Young people who cares, fights against drug dealers in Moscow. They search for drug spots and dealers after that punish them and mark with special permanent paint.

Some translation:

starting at 0:24, the guy with hidden microphone goes to cigarette tent. He asking for smocking drugs and talking about price. And get confirmation, here they sell drugs.

1:30 guys take out the seller. And asking him why he sold drug to a kid who is not even get 18 of age.

he refuses everything. They said that his drugs killing kids...

at 2:27 the police car took one of the attackers. guys ask why they don't take drug seller? After insisting police also took the seller.

at 2:55 guys take immigrants from south who sell smoking drugs (JVH) in the subway. Said them to go home and kill people with drugs at home. After, small execution with paint.