I *personally* like the eLIB3RTY vid, "A New Hope" (v2.0)... while it may not be the most informative, it's a good icebreaker because of its emotional power. I would link you to the YouTube url, but I'm blocked by my corporate firewall, sorry...
I also wish he'd take out the "taze me bro" segments.
It's popular and a great example of the police state.........but it's also the butt of a lot of jokes.
I agree, to someone that's not familiar with that tazer incident, they believe it has something to do with a RP rally! Which is absolutely the opposite message you want to convey -- We need A New Hope 3.0!