I thought Gary Redmond had a good suggestion concerning video as reference.
I inspected a home on a well. At the end of the inspection I went through the house and made sure everything was good before leaving, including checking the bathrooms.
The next day, the listing agent showed up to show the property, they flushed some toilets, one of the toilets kept running and they left without noticing it. The toilet ran the well dry, the pump shut down and the listing agent blamed me, said the pump was fried because I left the toilet running. A running toilet can fry a well pump. The buyer’s agent (friend of mine) went back up before I did and flipped the breaker a few times and the pump started up. Turned out there was a pebble stuck in the impeller and it came loose when the breaker was re-set.
It wouldn’t take very long to shoot video of the plumbing fixtures operating as designed as you go through the house.
I know there are inspectors who shoot photos of the vortices as water goes down the drain but it often doesn’t show up well unless the light is right. Is anyone shooting video for reference only, or in addition to?