As a huge fan of Harry Potter and the Whoniverse, this video is a perfect marriage of them both. The Goblet of Fire already stars the wonderful David Tennant as Barty Crouch, Jr. and the Doctor (# 10 - or 11th if you count John Hurt...who is ALSO Ollivander!) I swear, these British actors are in some club where they get these awesome intertwining roles!
Either way, take a gander. I really enjoyed this short and sweet crossover and hope you do too.