I like this talk. However, I would change the typeface to one still a bit funky and grungy (if that is how Lawrence wants it) but also a little easier to read in an instant. The video clips in the slides could also be trimmed a little tighter so that the ends do not include unwanted material. Again, I do not recommend that you present exactly like Lessig does, but there is a lot to like about his own style and approach as well as his enthusiasm and content. (Here is a post where I include Lessig's original remix presentation at TED three years ago.)
Above: Although Lessig does not move from the lectern, he is at least positioned right next to the screen. Also, he is engaged with the audience. He does not read off a script, but his slides in a sense become a kind of script for him while also helping the audience to follow his message.
EDUCAUSE 09 keynote: Getting Our Values Around Copyright
The presentation below goes a little deeper and is longer. In this video you see only the slides and hear Lessig's voice. Still, for online viewing, it works. (You will note that Lessig uses a different typeface that is easier to read while still being "different.")