I've filmed a couple of interesting / scenic approaches for my family to watch but wouldn't have dreamed have putting them on YouTube etc. GoPro mount suckered to the side window of an A320. I did email GoPro first to ask how their mount responded to pressure changes, and they admitted they'd not tried it inside an Airbus, they did say that they'd stuck one on the outside without a problem...
If someone is filming themselves instead of the view I'd be raising my eyebrows.
Thought it was quite beneficial because in one of my videos you could see my hand furiously stirring the sidestick, which stopped pretty much straight away once I'd seen it!