The Hyperdeck (the studio mini at least) is a bit rigid, but I managed to display a prores4444 with alpha channel. It is however jerky (with artifacts). I will check on the SD card side.
As a user of Resolve on windows, I struggle trying to generate a 4444 prores, so with alpha channel, that works on a hyperdeck. I managed to generate a prores 4444 file that works under Resolve, but the hyperdeck does not display anything. Does anyone have an idea, a profile?