Here's the video on Vimeo, if this isn't working for some reason, you can view it on Gaiman's blog here.
The always amazing graphic designer Chip Kidd has designed a graphic/text print version of the speech, to be released in time for graduation this year. You can see the entire book on the HarperCollins site, and an outtake is available below. As beautiful as the book is, I love to hear this in Gaiman's voice and in this short bit, which is one of the very best parts, you get both.
Problems? See it on UpWorthy.