Anybody know a good video that instructs in the basics of how to do breakfalls? I'm looking for something to cover how to fall forward, backward, roll, etc. I'd like something that covers principles that help you refine and improve how to fall safely.

Go find a good grappling school near you. Where do you live? I could probably help you find a judo school if you live in the states.

i was able to find several Mike Swain Judo videos and several Gracie JJ instructional videos on LimeWire. Neither went into great detail on rolling however. I have not seen any materials that really do go into great detail. It's either assumed that you know these simple moves, and practice them, or it doesn't make a very exciting product. I personally feel like the concepts and techniques of rolling isn't that complicated, but it certainly warrants practice. If you already know the basic rolls, I would say practice those.

aikido is crazy about breakfalls, look for their instructional stuff.

maybe this is a start if you ar eunfamiliar with the basics:

http://www.yorkjitsu.org/jitsu/breakfalls/

good luck-

PS
there is a Aikido software out, with amazing animations:

http://www.aikido3d.com/aboutaikido.htm

good luck

"Anybody know a good video that instructs in the basics of how to do breakfalls? I'm looking for something to cover how to fall forward, backward, roll, etc. I'd like something that covers principles that help you refine and improve how to fall safely."

it all depends on how you're falling. Judo breakfalls are for judo throws, not neccessarily useful for when you are thrown from your moped. since they are designed to let you "hit" the ground, in a controlled and relatively safe way.
and when it all boils down, falling safely all depends on your training, reflexes, and your reaction. ive seen many judoka injured from resisting the fall when they are being thrown, rather then yeilding and going with it.

the "only" way that you will win against gravity is if you yeild into its flow.

but anyway, you can only learn so much from books and videos. try finding a class near you, trust me, the first week, all you do is breakfalls, so you will get your fill of breakfalling.