Spring startup and fall shutdown put homeowners on a roof with their own cooling
Two rituals a year send people up a ladder to handle equipment they do not understand, and both arrive at your counter as questions.
In spring a large part of this metro is on a roof firing up an evaporative cooler. In fall the same people are draining it, pulling the pads and covering the housing. Few of them do either job well, and the questions come in waves.
Film the startup in a real house with the pads in your hand. Pad replacement, the bleed line, what a pump sounds like just before it quits. A clip like that gets re-watched every April without anybody touching it again.
Shutdown is the better shoot, because it ends at a furnace. A homeowner on the roof in October is already thinking about heat, and a clip that runs the two jobs together makes the maintenance visit obvious rather than a sales pitch.
The most useful thing you publish all year may be what happens when a swamp cooler gets fired up with the water still off, or covered in the fall with the line still charged. Your technicians see the result of both every season, and a homeowner would rather watch two minutes than pay for that repair.