Hi Jaan, We have recently purchased the HDzero system and looking how to enable the OSD. Did you find out any more info on this? Cheers!
FreeFly support replied: Please note that HD FPV with OSD is not functional on the Alta 8 Pro. The Alta 8 pro does not have a pixhawk but a PX4 flight stack that is customized in house. It is not compatible with Ardupilot. Probably easiest is setting up simple "dummy FC" with GPS that does support HDZero..
Hi Jaan, That's a shame. Pretty much what I came to when I looked into it. We've decided to keep the HD zero as a forward-facing HD fpv view and a secondary unit facing down with telemetry on a 2.5" monitor. The HD zero is in and going to hook up the normal fpv kit tomorrow. But failing that, your option sounds like a good work-around. Cheers