Google has posted a 30-minute hangout discussing the new YouTube design. Four Googlers discuss the changes and answer user-submitted questions.
As with most redesigns of major products, there has been a fair amount of backlash from users about the changes. Here, you can see Google defend the changes.
Google says the design is basically about getting more users to understand there are channels you can subscribe to. The majority of YouTube users, they say, don't realize YouTube operates based on channels.