How long should the DVD be? I see two lines of though here so maybe the best option is to build both into your DVD. Have it not too long. Half hour max because after you've watched it a time or two it will become hard work watching two hours or it. However, if the DVD included service and all speaches then how can it be less than a couple of hours????

As to labels. here's where I can really offer advice. Do not EVER put a sticky label on a DVD you burn yourself. NOT EVER!!!! The smallest of air bubbles or misalignment of the label can (and often will) change the balance of the disk and stop it playing completely. Also, they look cheap. What you need to do is buy some printable DVD-Rs (perhaps even glossy printables) and get yourself a printer than can print straight into them. Let the print dry and then give them a quick spray with a can of fixative. Perfect and look very proffessional.

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I'm not young enough to know everything!