Arduplane 4.5.7 TAKEOFF crash investigation

Hello guys,

Truly appreciate it if you could help with the video and long analysis of the crash during the TAKEOFF

FlyingWing Interceptor v2:

Foxeer F405v2
8S LiPo
Aos Supernova 8s 2207-1570kv
Gemfan 6042

CG was OK. Takeoff weight ~1200g
At the very 1st seconds it started climbing, but suddenly descended&crushed… (Video shows the process)

Any ideas what could went wrong?

thank you