But all we're seeing thanks to YouTube video are the final moments and the disaster of the post-game handshake.

The rough Google translation from the Russian media reads:

February 14 universal sports complex "Vatan" was a match between the team of "Ak Bars-2" and "Wave". Hockey sticks crossed players born in 2006. "Attempts to solve the problem in the melee were shown throughout the game. And at the end of the match, the boys passed the nerves, and the friendly handshake turned into a massive battle on the ice.