I don't own any equipment that can directly record video from a TV/computer/DS/Game Boy/PSP/iPhone/etc. Even if I did, I wouldn't feel any need to film my capture of Suicune. The only thing I've ever done like that was filming the first battle that happens after completing the game in Pokemon XD, which I did using a regular digital video camera, and didn't have much of a reason.
And yes, I knew that I would fight Suicune already. I'm kind of a Generation II nut, you see.