This works for search results, comments, suggested videos, homepage videos, recommended channels and more. You can find more about a YouTube channel without having to open a new page.
Sometimes YouTube also shows a list of people from your Google+ circles that subscribed to the channel:
The experiment also includes the "I'm feeling lucky" play button I've mentioned here. This time, it's placed next to the upload button. The play button creates a playlist with recommended videos.
Here's how you can enable the experiment. If you use Chrome, Firefox, Opera, Safari or Internet Explorer 8+:
1. open youtube.com in a new tab
2. load your browser's developer console:
* Chrome/Opera 15 - press Ctrl+Shift+J for Windows/Linux/ChromeOS or Command-Option-J for Mac
* Firefox - press Ctrl+Shift+K for Windows/Linux or Command-Option-K for Mac
* Opera 12 - press Ctrl+Shift+I for Windows/Linux or Command-Option-I for Mac, then click "Console"
* Safari - check this article
* Internet Explorer - press F12 and select the "Console" tab.
3. paste the following code which changes a YouTube cookie:
document.cookie="VISITOR_INFO1_LIVE=0xJL6SMMUyE; path=/; domain=.youtube.com";window.location.reload();
4. press Enter and close the console.
To go back to the regular interface, use the same instructions, but replace the code from step 3 with this one:
document.cookie="VISITOR_INFO1_LIVE=; path=/; domain=.youtube.com";window.location.reload();
{ Thanks, André Zlatin. }