Unbelievable what DJI software engineers are able to achieve. This is impressive.
So it's very hard to understand how OTG issue cannot be solved as that should be far easier engineering problem.
Unless, it's not actually engineering problem...
Waypoints also should be far more easy engineering task.
The other thing, is on a very bright day, the shutter speed is way too high. So jitters look like artifacts. An ND filter will help a ton here I think.