This presentation was given last year. The presenter was not in the room; it was recorded and played back.
For that reason, there is more text on the slides than I would usually put. The challenge in recording a presentation for viewing without the author present are different from the challenges in giving a presentation in general.
In particular, a key is to keep the interests of your audience. When giving a presentation, you should tailor the delivery based on your audience... it's hard, and it requires careful slide design.
Watch the presentation. You'll need Java.