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Eyes in the Sky: A Comprehensive Survey of Ukrainian Unmanned Aerial Vehicles (UAVs)
(www.lvivherald.com)
This is a most excellent place for technology news and articles.
https://www.dji.com/fpv
All the drone footage I've seen has been analog, and I guess it's possible on the FPV.
I think DJI might be referring to the recently introduced "race mode", which reduces bandwidth of their transmitter and allows other pilots (with analog systems) to fly nearby. In regular mode DJI video systems tend to interfere with analog transmissions.
I haven't heard of any official way to get analog video from a DJI air unit.
From what I read they actually work with 3rd party analog receivers from the drone itself.
Ex: https://www.reddit.com/r/fpv/comments/16n8ztu/hi_dji_goggles_for_analog/
That was a feature where you could attach an analog receiver to their Goggles v2. They have since removed it in newer Goggle versions. Their system is basically a walled garden now.