Great feedback about
video marketing concepts here so far... I've been looking around a little for other online promotional videos that help to gain trust and create sales conversions for website visitors.
The Authority Black Book video concept looks like a good one to increase opt-in conversions.
One of the best places to see the right way to make a promotional video is from an expert in copywriting. You can see an example of a basic presentation video on Michel Fortins blog on the right hand side. See it here:
http://www.michelfortin.com/
He's got a basic, powerpoint video with audio presentation. Similar to some of the Rich Schefren videos that were so popular. It's a little slow getting going and is focusing in on the beginning marketer. However it's a good example of how with powerpoint you can create an online video to use on your own blog or website.
Keep up the great postings... If you've got other examples of video marketing concepts done right share them here!