JMO - and with the caveat stated up front that they always get caught - this tubby waddler, if indeed the shooter, is no Luigi Mangione, but in terms of presenting an unremarkable image on camera, I see preparation and practice: choosing the time and place, devising the preferred route there and back, walking that route to and fro a few times, etc.
Just another shlub walking somewhere on a chilly day.
They always get caught, yes, but I think every iteration of these shooters continues to evolve with time and technology. There was the radar detector, and then came the radar detector detector.
You can't be alive and sentient in America now and not know cameras are everywhere, or could be everywhere. Some shooters want their atrocities caught on camera, some are so crazed they don't even think about it, and some few others know they must take cameras into account and plan accordingly.
This individual seems fully aware of cameras and maybe put some thought into how to navigate the presence of them. The fact that two days later no arrest has been made suggests that, for now, the plan was successful.
Not sure they anticipated having to stop, turn back and pretend to read that sign at the corner to avoid attracting any attention from the passerby across the street, but they did make the adjustment, though not convincingly.