Question 1: Why all the faces of those "解放軍/公安" were not showing (more likely to be avoided intentionally) in the first part of the video, but then we can see their faces in the later part?
Question 2: Why the "解放軍/公安" didn't stop the videographer/reporter who was staying/filming so close to them in the first part? But the later part were mostly wide angle shots (implied that the videographer/reporter couldn't stay closer)?