Here is a "scrum in under 10 mins" video that does a decent job.
http://www.youtube.com/watch?annotation_id=annotation_650246&feature=iv&src_vid=Q5k7a9YEoUI&v=XU0llRltyFM

Also, I'd try the wikipedia page on scrum - it's actually quite good. http://en.wikipedia.org/wiki/Scrum_(development)

You can start with those, but 30 seconds to 1 minute is a pretty tough task, and I'd say you should be able to ask people on the team to spend more time than that to learn the new dev process.

Here is an Intro to Agile Scrum in Under 10 minutes video that does a decent job.

Also, I'd try the Wikipedia page on Scrum - it's actually quite good.

You can start with those, but 30 seconds to 1 minute is a pretty tough task, and I'd say you should be able to ask people on the team to spend more time than that to learn the new development process.