У вашего броузера проблема в совместимости с HTML5
Hand Built T-copter hand launch and catch never touches the ground.
www.tcopter.info Shot with hat cam so I apologize for the bad photography. I build each T-copter to be extremely crash resistant. a crash from 50+ feet might only need a prop or nylon bolt or a zip tie. worst case is some glue. I've done a lot of crash testing, some of it on purpose!