I did a video a couple of years ago so it's kinda lo-def, but I think it gets the point across.
Setting intonation is relatively easy and should be done on a regular basis if you're changing string gauges or bridge height.

http://guitartricks.com/lesson.php?input=9407


note: this lesson was actually hidden from view because of the low video quality but I've made it temporarily visible for ya.
Probably best if you download it to your computer cause it'll end up getting hidden again until I get a chance to update it to hi-def.