Another terms is called vblog if you are using a blog .Well the best example is Darren Rowse from problogger.net ,he posted new video every week ,the video is so professional and the info he shared is so useful.If you would like to use youtube as a marketing tools,you should familiar with video editing and you should well present in front of web cam/video.Other wise,it wastes your time and is not effective.

My advise:You should try and review how effective this tools to your products.

__________________
Internet Millionaires Cub
$7 Secrets