YouTube incorporates Vuvuzela

YouTube incorporates vuvuzela try any video and there it is after the resolution switchboard and before Language tools the soccer ball

It can be switched on and off plays a small audio clip in loop of vuvuzelas in resonance

It is strange why would they put such a thing?
Maybe they want users to have the vuvuzela effect in all the match videos available on YouTube.

Update:
this feature is available on new YouTube player only