Because humor is cool! (feel free to add a couple of your own finds - just be sure to leave some for others to contribute .)
trying to find one without annoying ads so I settled on this clip with Catherine Tate and David Tennant for Comic Relief with some Doctor Who gags thrown in... [yt]http://www.youtube.com/watch?v=WxB1gB6K-2A&feature=related[/yt]
This isn't exactly humor, but it pretty entertaining if you're into the music from the show: [yt]http://www.youtube.com/watch?v=_D6kzGTj6vk&feature=share[/yt]