I just installed Joomla 3.0 and I'm not great at it. Here's what I'm looking for though. I give Joomla my YouTube channel's url or the url of it's RSS feed. When I do it checks this feed at a set interval constantly and forever in the future. If during one of these checks, it sees I have uploaded a new video it automattically updates so that the video is listed.
I would actually recommend using something like Youtube Gallery. You can fully customize the output (though not into pages):
Here's an example of the type of page you can make with it:
Any time there's an update to the channel, it gets loaded into the site automatically.
You're looking for the News Feed manager. Just go to the backend, load your youtube's rss url in the news feed manager, then create a menu item pointing to it.