I agree with FlyingCruiser - I enjoy YouTube flight reviews, they’re a valuable and sometimes entertaining resource. As long as customers or crew aren’t directly being filmed, and if they are caught on camera, their faces blurred, I don’t see a problem.

Being discreet is key, don’t bother other passengers or crew. Top of the voice shouting to the camera isn’t okay, filming the seat and experience in a non-disruptive manner, completely fine in my opinion.