For me, the ideal cardistry video would have a few elements to it, and not much more.
- A good, appropriate soundtrack to the pace of the effects you perform, but not one that would overtly distract from the performance; a track that stays in the background.
- A cardist who takes the trouble to dress up a little. Tuxedos are optional, but maybe throw on a nice shirt, maybe a vest or a jacket, perhaps a tie. Get a MANICURE (anyone performing with their hands should have one, it's NOT really optional, folks!) and fix your hair so you at least look neat if not stylish. The outfit should NOT be flashy, since you want to show off your cardistry and not your fashion sense.
- A camera, and not a camera-phone or a point-n-shoot. If you're going to look professional, you will need professional-grade tools.
- A VERY LIGHT touch in the editing room. Whiz-bang special effects, if used at all, should be kept to the bare minimum and used to lend impact to the performance and not simply "look cool". A continuous cut of the entire routine from one perspective shows your skill, and I love that, personally, but I know this is the post-MTV Internet generation and you want to punch it up a bit. Still, make one take exactly as described, then do close-ups in slow-mo of some of the more intricate bits (that's slow-motion camera, not slow-motion performer at regular speed)! Intercut them into the continuous shot at the appropriate points. If you want to really point out the fact that the close-ups are separate from the main shot, use a different deck, or the same deck in a different color. If you want to get goofier or flashier than that, perhaps do something like Jackie Chan does and put it on-screen during and in-between the credits at the end!
That's my rather opinionated two cents. Take it for what it's worth to you.