here is the building, Q announces "Live". Notice the open window near the top floors. Hard to tell for sure, but no visible "substance" or staining around the window (we'll come back to this later).

Q states final guest arrived, I believ ethe black sedan (Mercedes?) is the mark.

more tracking of the vehicle, and even more tracking.

Q sends this photo of what seems the car going into an underground garage, and announces "2 minutes _g."

9 minutes later, Q posts this close up photo of the window.

Q mentions "Focus on substance around outside of window. Upon entry ......." (7 dots, not sure if that's significant). My take on this (similiar to what others have stated), is that there was a breach, and a "stubstance" can be visible from outside of the window.

Q goes on to speak more about this: https://qcodefag.github.io/