[Billfred]

I'd say humor with discretion. Some things just can't be funny, like safety. Hence airline videos are so boring, as are most videos that I have seen.

Of course, good humor can be used to reinforce your point. Just use it sparingly, and you probably want to show it to your sponsors to get their okie-doke before you submit. After all, your team is on their dime, so it is wise not to tick them off. Ever.