About the movie recording not working with wifi enabled.
I'm not sure if it is true but it makes sense to me, but I remember someone mentioning here on the forum that this feature probably doesn't work because of a shared DMA channel between WI-FI and video recording hardware.
So only one of them can be used at the same time, which means the hardware is simply holding the feature back and not the firmware/software.
But I do wonder if it is possible to enable somehow video recording through wi-fi, by after the start signal, the camera shuts down the wi-fi connection and goes recording and the enables wi-fi after recording again.
But that sounds like a lot of work to implement, which I have no knowledge about