Technology blog GHacks reports that YouTube is testing a new homepage design and that anyone can force this new design by adding a cookie to their browser. Here's how to do to so for Chrome and Firefox.
To enter the cookie go to YouTube in you browser and for Chrome open Developer Tools by using the keyboard shortcut Ctrl-Shift-j and for Firefox use the shortcut Ctrl-Shift-k to open the web console.
in the console tab and then reload the YouTube tab.
The new layout is a three pane system with user and channel info in the left pane, subscription updates in the middle pane, and recommended videos in the right pane. It is a less-busy layout that I hope YouTube decides to incorporate.
How to Get the New YouTube Homepage Right now [GHacks.net]