Seems like a malfunction on a homemade rig. Possibly throttle cutout when descending? Why the pilot would insist on using this on what seems like a professiona

Seems like a malfunction on a homemade rig. Possibly throttle cutout when descending? Why the pilot would insist on using this on what seems like a professional job is beyond me. The industry is coalescing around a couple of field tested professional rigs (DJI products for instance). I hate all these FAA regulations around stuff people do in their backyards but at a professional event like this (with this many people around), it seems like a no-brainer that air worthiness should be tightly regulated. Source: been building drones for 5 years. EDIT: This is Europe. So EASA not FAA