YouTube website redesigns and will adopt Google accounts

Google Operating System News: After the update of Youtube's embedded player, today, the homepage of Youtube has also been redesigned. The most obvious change is a large search box placed in the middle. More importantly, you can log in to Youtube with your Google account for registration, instead of directly logging into Youtube. This may be a temporary choice in the process of the full integration of Youtube and Google.

If you try to log in directly from the homepage of Youtube using your Google account, it will not succeed.

See the screenshot:

The newly designed homepage of Youtube: