No higher resolution than hourly. A lot of things can happen in an hour.
Whats going on with the blue on top of the parked cars? Police emergency lights? Consistently visible over hours could indicate they were turned on for quite some time, but I'd expect more blue light mirroring off other surfaces.
Some sources claim the Pope was apprehended in his apartment, which is off-screen to the right. For a high profile, low visibility operation I don't expect to see St. Peters Square be filled with police.
I dunno, people.