It looks like that redesign was worth it. The Google-owned video site has recently revealed that it's now streaming 4 billion videos every day, up 25 percent on daily views from eight months earlier. According to Reuter's report, the site now has to deal with around 60 hours of uploaded video every minute. As long as those education videos are kept separate and the cat content keeps coming, we'll be happy.
Update: Check out the official stats on Google's YouTube blog post, in the video embedded after the break, or a site chock-full of relevant visualizations the company has put together at OneHourPerSecond.com