The roof key lives with the super and the freight elevator closes at five
Access is the constraint that decides your schedule, your costs and what a camera can ever be pointed at.
There are no driveways. A vendor arriving at a Park Slope walk-up parks somewhere he should not or does not park at all, carries everything up the stairs, and loses time to the trip before touching the work.
In an elevator building the freight is booked ahead and shared with movers and deliveries, and a slot missed is a slot gone. Roofs, bulkheads and machine rooms are locked, and one person holds those keys.
So the filming happens inside the work, or it does not happen. A water tank inspection, a boiler room walk, a parapet check on a roof you are already standing on because the super let you up for something else.
Publish the operation rather than the finished job. A board member who watches how a routine inspection actually gets staged in an occupied building learns more about your firm than any list of services would tell them.