Well it's one thing to put it on a suction cup, a whole different one placing anything by the sidestick...
I'll admit to having taped myself taking off or landing at unusual places, but never I have posted them online (not since I'm at a large carrier anyway, did posted a few when flying the DHC-6 some years ago though).
I think it's okay since you don't post the videos (publicly) and don't fiddle with the thing in critical phases. Turn it on and off well in advance...