Keep in mind that the shot of the running man, has up to 10 seconds of an "empty shot" (nothing happening) before he suddenly appears and runs up the alley. As such I feel shot 7 is the same, it just has a bit of run-in time before the person is visible. That footage, that WE are working with, remember, is filmed by ITV news. They filmed a projector screen, and obviously decided to cut it off shortly after shot 7 starts.
Personally, I feel debating shot 7 at this point and a possible lurker in a doorway there, is a step backwards. However, I believe that one camera, covers so many angles, at least 5, for 30 seconds a piece. We know its angles are:
Angle 1: St Johns Street, wide [camera looking North] (30 seconds)
Angle 2: Brentgrovel Street, wide [camera looking West] (30 seconds)
Angle 3: Officer's Club Courtyard [camera looking at ground below] (30 seconds)
Angle 4: Horseshoe Alley wide [camera looking East] (30 seconds)
Angle 5: Horseshoe Alley, Cornhill closeup [camera looking East] (30 seconds)
Angle 6 (unconfirmed) may be a closeup of St John's street, but probably not. Even without number 6, that's 1 and a half minutes of time where nothing is watching the Horseshoe. Suffice to say, the workload for this CCTV camera is arguably too high. Covering more angles with shorter times may have its drawbacks... They really should have a dedicated Horseshoe/Cornhill closeup camera. Instead they stuck it on the corner and gave one camera an additional workload.
The camera zooming in on the running man is pure co-incidence and it's probably fooling people into thinking it has motion detection (I was fooled by this) or that a camera operator is actually watching.