Originally Posted by
MikeMpls
Only in public spaces, e.g. at the gate.
Inside the plane the airline gets to make the rules, but if they want the video handed over and/or deleted, it's a civil matter. By the time they sue you, it will have played out on YouTUbe.
Reconsidering the 2nd part of this, and from the IANAL (I am not a lawyer) department, once police are involved the courts might very well decide this as a 2nd amentment issue. Documenting police activity (and esp. abuse) is an important 2nd amendment activity and fairly well established in the case law.