[throwlaplace]

>What's a labelling tool that non-technical users can use intuitively?

i haven't used it but microsoft has this

https://github.com/microsoft/VoTT

>"If we spend all this time and money labelling footage, how well is the going to work?"

"not well at all because we don't have facebook/google scale training data. let's try to figure out a conventional way to do it". for the supervisors problem i would recommend bluetooth beacons.