Video Description: Basically, it's just Legolas saying "They're taking the Hobbits to Isengard!" over and over, set to a dance version of the LOTR theme, interspersed with funny reaction shots from Aragorn and Gollum. At one point, Celeborn shows up to say, "Tell me, where is Gandalf, for I much desire to speak with him," and Legolas replies, "A Balrog of Morgoth." The video ends with Gollum shouting, "Leave now! And never come back!"
I know that sounds completely stupid, but it is utterly hilarious. I laugh endlessly every time I watch it.
[H/T to KennyBlogginz.]