У вашего броузера проблема в совместимости с HTML5
In this episode of Fixing tech on the kitchen table I mod a Mega Drive 2 to output 50hz or 60hz at the flick of a switch. "Fun in a Bottle" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/