Hey,
I find Youtube and other social networking sites a great tool when promoting Webinars, I am a huge fan of them, they make me a lot of cash.
Anyway, we do things a little differently, and have an entire team and series of scripts to do some crazy stuff with them.
I would be happy to talk to you about what we do, and most importantly, show you how you can do the same for your business... it is killer for list building, conversions, and profiting from webinars with almost zero effort (seriously)...
I have setup a quick (private) survey to help us... can you take 30 secs to fill it out, and I will be in touch shortly.
http://surveymonkey.com/s/webinarvip