no but i was tempted to write one.
You should do it, brand it Rtcustomz I want to wrap alot of stuff but really dont want to screw it up.
just setup a business youtube channel... TheRTCustomZ
http://www.youtube.com/user/TheRTCustomZ
will start doing some videos soon.
Free advertising, support and youtube integrates with facebook and all other sites nicely too. Cant wait.
A few tips though
1. dont have a 10min intro with your favorite song. annoys the hell out of me.
2. write down or script what you are going to say as alot of the time people are a mess when talking.
3. have a good tripod or camera man with good lighting no one likes a dim video.
4. talk clearly
5. make it in HD
Sorry if thats alot but I hate videos which dont conform to these rules.