There's a good reason for it, and usually is a sign that the video is immensely popular. You can find out why on Youtube it self: http://www.youtube.com/watch?v

There's a good reason for it, and usually is a sign that the video is immensely popular. You can find out why on Youtube it self: http://www.youtube.com/watch?v=oIkhgagvrjI http://www.youtube.com/watch?v=oIkhgagvrjI