У вашего броузера проблема в совместимости с HTML5
Intro By MacLobuzz Templates:
https://www.youtube.com/user/dendee82/videos
Visit my 2nd Channel with Non-Arkham Related Videos: https://www.youtube.com/channel/UCmlMA138o7XA5QA53GFdfzw/featured
Code is in the description of this video:
https://www.youtube.com/watch?v=vVQKVVT45k8&index=4&list=PLJlZIea4eFTMxSNtZwZTucaVYOUUupaEr