Some of my friend in HK had contacted them but got some general/official answer that such product will be available soon, and no more details about when. Asked if there is any demo pic , video clip and got zero reply.
All I wanna say is that taping the video format into the Tesla recognized video feed is a hard job (at least to me), we spent quite a lot effort to crack it).
That makes sense. If it was really easy, they would have done it. But as it sits, they already had working products for Chevy and such, so why bother with all the tight R&D for a Tesla with much smaller ownership numbers.