I've been using a unbranded one for about 5 years now across 3 cars all good, I think Techmoan on YT reviewed it back when he was just a small channel but I can't remember the what it was called it's meant to be hidden by looking similar to the wing mirror part.
I was in a recent incident & it provided good footage for all involved, H264 is the recoding codec.
I used to power it from the cig lighter socket but its awkward on the GS4 so this time I went with a OBD2 port lead & the radio still works ok no interference.