[ Source ]
Fully working MI6 version for ROM Aicp_sagit_o-13.1-UNOFFICIAL-20180119:
MGC_5.1.018.177470874.41362666_MI6_1.0-beta.apk (36.40 MB)
+Working auto-focus, touch-focus and all the active configs in the settings.
I only tested it on the aforementioned ROM, but I think that touch-focus should work everywhere.
Didn't test it for that long so there might be some bugs.
To prevent use of flash while shooting a video choose UHD 4K in settings.