Nobody unless I act like a d1*k. But here in Europe drones are certified as a system, DJI declare approved accessories (look in the manual, they are listed) and the moment you add an unapproved accessory your drone falls out of certification and...
I don't think your screen recording has anything to support what you've guessed to be the cause of the incident.
It looks like your drone descended under power (landed).
The recorded flight data is always the place to look to find what actually...
Not necessarily, they probably only go through flight data if they are trying to find the cause of a loss, (or the PRC Army have asked them for some specific information).
Probably because the OP has opened a case about his various drone losses. They (DJI) will want to make sure they have all the data they can get from the RC as both drones are total losses.