Please take a look at this video about an unfinished branch of the London Underground's Northern Line. Yeah, the topic sounded boring to me too, but it is so well made it deserves your attention:
Forget kittens and illegally uploaded music videos, this is YouTube at its best.
The makers have created a documentary about a potentially boring subject into an engaging, entertaining and informative story. I don't agree with his opinions, but the presentation style and the execution is very impressive for an amateur production. Clearly they have spent a lot of time making this film, and I feel it deserves a greater exposure, so get tweeting, embedding and linking, dear reader.
I also think there is potential here to engage a wider audience for more nuanced political issues and campaigns. Proportional representation springs to mind. I could spend a couple of hours making a 2 minute video about STV, but I doubt it would get much attention. However, with more effort, a witty, engaging video could get tens, maybe hundreds of thousands of hits, potentially from an audience that hadn't even heard of electoral reform before.