my first fpv with crash at end

Q800 Hexacopter,unmannedtech,880kv motors,30amp esc,11x4.5 props,apm 2.6,3s 5500mah lipo,10 mins flight,loiter,return to land,carbon fibre frame,arducopter,multirotor,mobius,brush­less gimbal,1080p,720p,