This one had the sense not to open open until after the winds and rain of the last few days.
The blip I really wanted turned out to be too small (owing to the need to crop fairly hard) to be accepted by the software. Yesterday I suspected that we had occupants of one of the nest boxes, so I set up the trailcam pointing at the box. The first video at around 6:00 am wasn't a bird, it was a squirrel. It was making its way down the wall presumably having crossed from the Holly tree onto the shed and then used the rough wall to walk/climb down.