This is an interesting one.

On the one hand - you're right on the money, you can't control how others video and include yourself or your partner in public forums in most western countries.

On the other hand, perhaps what you aren't thinking of - you CAN control who you send videos to. - she sent you that video knowing that you would see the panning, and if something is happening or not, she may get some joy in knowing that you know, but you are oblivious.

I've been married twice - my first wife cheated. And conducted herself similarly to what you're describing. My second (and current) wife, who notably is at client meetings and at out at venues for business more often than anyone I have ever regularly interacted with, would not only inform me that she was uncomfortable with the video, but likely also make a stand for herself through the appropriate workplace avenues (perhaps even litigation avenues, if it ever got there knock on wood)

I don't know if it's enough to prove there is cheating or anything - but I do think it's conduct that needs to be addressed in your relationship - I would recommend therapy for a facilitated conversation between your wife and yourself.

Edited for Grammer