Don't get me wrong, I don't like that rule!! And there are a growing number of people that believe that, if you are buddy boxing while flying through the goggles, you are following the rule.

Trick is, the system you showed is slick and uses the trainer port (on a radio that lets you assign channels to the trainer box). This system kind of messes up flying with an actual safety pilot using a buddy box, although you could do the same thing with a second transmitter for the goggles. I think it is very very cool.