I find a good source for these is cover disks from magazines.

the mags on offer in the UK always reprint the same 'beginners guide' every single month and appear to have no actual content for anyone who can spell 'video edit'. However, I often find the contents of the cover disk make the purchase worth the money.

Other than that I'm sure google is your friend or you could invest some cash in some s/w to make your own.

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I'm not young enough to know everything!