I've filmed onboard many times and I've shared some of my videos on FT. I've always had it arranged and cleared by AC Corporate and everytime, the captain and SD would always be in the know and tell the rest of the crew. All shots were always contained within my pod or in areas with no clear shots of passengers faces. Any crew filmed are asked permission and are cleared before the final. I also never speak to camera on board a flight as I'd hate listening to someone vlog on a flight. Some people just have no class when it comes to filming in any shared spaces. I've been on some Lufthansa flights where I've been told not to film anything even in my own pod for personal use with my phone. Best thing is to use common sense and respect other passengers privacy