Event - Every 2 seconds of game time
Condition - Units in (playable map) owned by player 2 equals to 0
Action - Run (cinematic 01010)
Action - Turn this trigger off
though dead units are still concidered to be owned by a player, you'd probably want to match with alive units, and u might want to match with is a structure too
Event - Unit owned by (owner of the buildings) dies
Condition - Units in (playable map) owned by player 2 equals to 0
Action - Run (cinematic 01010)
Action - Turn this trigger off