Trigger help

Ok here is my problem

I have so when all buildings a destroyed a cinematic starts, and then I want to remove all units, so they won´t be in my way.

So I made so when befor my cinematic starts I run another trigger looking like this.

Action
Unit group - Pick every unit in (region 1)and do (unit type of (Trigger uinit))Equal to Footman) then do (Unit Remove (triggering unit) from the game) else do (do nothing)


but this won´t work is it becouse I dont have any condition or event?

instead of 'triggering unit' then set it to 'picked unit'

Action
Unit group - Pick every unit in (region 1)and do (unit type of (Picked Unit))Equal to Footman) then do (Unit Remove (Picked unit) from the game) else do (do nothing)