I live that video a lot but then do you really have a choice ? For example on those numerous occasions when TSA takes you to a separate room and starts questioning do you really have any right to call a lawyer ?
The TSA screeners you interact with at the airport aren't police.
I'd have said, "The TSA aren't police", full stop, but at some point, the Federal Air Marshals were folded into the TSA umbrella, and they most definitely are police.