Customization for displaying webcasts

Hello,

This question is not specific to a Plugin (although a Plugin could resolve it). I was wondering whether the following would be possible using WP:

I host regular webcasts (video streams/audio streams on a particular page). However, one disadvantage is that if I give out the direct link, people would not register. So, I was wondering, if, using WP, I could create a page which would show a registration form and then once people fill it in, they are shown the webcast page (displayed as an iFrame within the same page, upon submission).

Idea being that people should not be able to see the real url of the page where the webcast is hosted, instead just the registration page url at all times. This would allow me to monitor views/registrations.

Wondering if there is some solution (combination of Plugins) to achieve this?

Regards,
Hasnain