This video is real. It was filmed at the Donetsk airport by a pro-Ukrainian documentary film maker.
It shows a zealous Ukrainian volunteer who is explaining there is no such thing as peaceful population in the rebel-held areas – everyone should be considered an enemy combatant - and dealt with accordingly.
As soon as these words leave his mouth, a shell explodes near him, knocking him out cold.
Donetsk airport is where rebels claim government forces have been shelling the city of Donetsk, killing many civilians.
In September Ukraine President Poroshenko seemed to endorse a strategy of terrorizing and targeting civilians:
"Our children will go to schools and kindergartens... theirs will hole up in the basements...
This is exactly how we will win this war!"