RE: Extreme Flight Extra 300 50cc /Not rebuildable video
Look at the video very carefully. Check out the shadow just before he takes off. Unless my eyes are deceiving me, I see a collapsed antenna. Note also in the first flight that the pilot taxis out and around with the antenna collapsed but does of course put it out prior to takeoff. That is a bad habit and may have been the cause of this crash. I've seen several crashes due to collapsed antenna and they fly out just a short way as did this one before control is lost.
I add my sorrow for the loss...