Before leaving, if my film didn't already come in clear film canisters, I pack each roll in clear film canisters I've saved. This makes it easier to remember where location shots were taken when I compile my photo albums entries later. But remember - you must put the corresponding letter on the film lab envelopes when you drop your film off. If I'm taking video, I'll tuck the compact tapes into my shoes, which I pack either in my carry-on, or in my checked suitcase. Either way, your video will only be subject to x-rays.
Some people purchase lead-lined bags to hold their film, and let it go through with their luggage.
I do not. This forces security to zap your bag with a much higher dose x-ray. At the last minute before walking through the checkpoint, I simply take out my zip lock bag, and motion to the security person if they could very kindly hand check it. This increases your chances of having your film hand-checked. Finally, be prepared to deal with the occasional security guard who is simply unwilling to get off their chair, or forces you to throw your zip lock bag down on the x-ray detector, no matter how ideal the circumstance.