У вашего броузера проблема в совместимости с HTML5
The basics of protection schemes for transmission and distribution lines and transformers. Relevant: http://www.youtube.com/watch?v=duyC2OFie5E The music at the end is Astronomia [http://www.youtube.com/watch?v=rlfcUbTQTC4] covered by DissBeleif [https://www.facebook.com/DissBelief].