I can confirm that the best fpv goggles experience for the Mavic Mini currently (until SDK is supported, and even then probably) is with the bluetooth dongle system.
What you need is goggles (Yuneec Skyview, any DJI goggles, fatshark), a miracast dongle, a powerbank, and an hdmi female-female adapter. See video and video description for setup. This post is in this section of the forum because the DJI FPV series goggles are compatible and because this is a very useful thing for Mavic Mini owners who want to fly FPV. This setup has the lowest latency and actually allows fpv flying, as future videos will show. Thoughts, comments?
ALTERNATE SOLUTIONS and tested ideas (did not work or not as good): -android tablet with hdmi out to goggles -->greater latency, less portable, more costly if you already fly with a phone
-attach an fpv camera module to mavic mini, fly w analog goggles-->terrible quality, better to use the drone's own camera system rather than buying a module that is not intuitive, portable, or integrated. It's pretty much flying through static versus flying through latency, just what you prefer.
-download the emulator BlueStacks on your PC & download DJI Fly-->no DJI Fly app available, also wouldn't work anyways
-attach the Insta360 camera to mavic mini -->interferes with IMU compass & with GPS, would need 2 devices to fly
-split signal from phone to goggles and remote with an hdmi adapter -->not possible, does not split signal
-split signal from remote to phone and goggles-->also not possible, does not work with any (cheap, expensive) hdmi adapter
-gopro app and attach gopro hero 5 session-->too much lag with app, range issue
-use litchi with mavic mini-->SDK not yet available from DJI to use officially with 3rd party apps
-buy $125 DJI hdmi module-->does not work, too expensive anyways, risky might ruin drone system -put your phone into a VR headset-->cannot touch the screen, do quickshots, etc. -use one lens fpv goggles-->defeats purpose, same as VR
-IPad Pro--> one port, so even with adapter the 2 signals to remote and goggles are in different modes, so cannot send both at the same time
-higher RAM tablet (Teclast M16) than the Winnovo T10 tablet-->no difference in transmission as expected
-Samsung tablets--> no hdmi ports? OTHER SETUPS THAT WORK:
-use DJI Goggles with mavic mini same as the skyview goggles
-use fatshark goggles
-use DJI Racing Edition Goggles
-fly phantom drones with goggles (controller hdmi port shown in a DJI official video)