Hi Garth...you're welcome.
One thing though, there aren't that many deaf people who drive

Fitness and health info though is a wonderful idea to offer to the deaf.
I created hot videos (including health and fitness) by inserting closed captions from hundreds of free transcriptions I found at sites such as
http://about.com
and
http://ehow.com
Check out those sites as well as others like Monkey See, for transcripts.
http://www.monkeysee.com/
Go for it!
God loves you.
Brent