У вашего броузера проблема в совместимости с HTML5
http://youtube.com/symphony Wolfgang Amadeus Mozart - Finale from Concerto No. 5 for violin in A major, K. 219, featuring guest artist Gil Shaham.
The world's first collaborative online orchestra performed at Carnegie Hall on April 15, 2009. Selected by the YouTube community and several members of the world's most renowned orchestras, the YouTube Symphony Orchestra is made up of over 96 professional and amateur musicians from 30+ countries and territories on six continents and represents 26 different instruments.