Extraterritorial effects are usually limited in scope for this kind of concern. If I had to place a bet I'd say this is the main line of reasoning the current Supreme Court would use to side with the "the law where the recording happens" as well. I may just be advertising my biased though, as that's also the conclusion I think makes sense personally.

Until that actually gets reviewed by a higher court (or more descript higher law comes about) what each regional court concludes remains the reality for cases in that region though.

I'm not a lawyer myself, I just had to spend some time with the company's regarding this topic recently ("yay" for filling in to manage internal IT on the side).