У вашего броузера проблема в совместимости с HTML5
In this video we'll code the box blur algorithm described in the previous part. This is a C++ implementation but it's going to be designed (I hope anyway...) to encourage an simple port to SSE.
A great description of the algorithm can be found at Amrita's blog here:
http://blog.amritamaz.me/post/42203030076/understanding-box-blur