The YouTube feature I mentioned a few days ago is publicly available: YouTube automatically generates pages that list the most recent videos embedded in a blog.
"By crawling web feeds of sites that have embedded videos, we've built dedicated pages that highlight your embedded videos. This means that there is now a place on YouTube to find videos mentioned on your favorite blogs & sites," explains YouTube's blog.
You can find pages for blogs like Engadget, Boing Boing, Google OS and the nice thing is that the URL is easy to guess. Unfortunately, the pages don't have feeds and you can't follow them.
For now, you'll find links to these pages next to some videos in a section called "as seen on". Instead of linking to a popular page that embeds the video, YouTube now links to a page with the most recent YouTube videos from the site.