This smoke allows you to smoke off control completely without being seen throwing the smoke from dark or B site. The beginning of the clip is just to show you where the smoke will land precisely between the two windows.

Line up with the right edge of the metal rectangle in ramp. Aim at the corner of the dark square on the floor. Left click throw.

Caution: the smoke can allow enemies to sneak out of control if the glass is broken. This is a concern for every control smoke and should be kept in mind.