Posted by BSG here, translated by Oleg.
All modes work on mi max 2 running miui pro 8.8.2 version. To make it work on Android 7 you need to:
1. Enable Google photos as internal gallery
2. Disable "reduce photo camera noise reduction"
There is a bug with the video file thumbnail not appearing after video capture is finished but the file is saved correctly.
PS1: I couldn't disable HDR+ on front camera so this won't work on mi5s running Android 7.
PS2: Front camera video doesn't work.
(Oleg's note: On point number two he's talking about an actual setting which is probably named a bit differently than I translated.)
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