You need a Google Account to sign into YouTube. A Google Account gives you access to all Google products (e.g. Gmail, Google Groups, Picasa, Web History, YouTube, and more).
If you've signed into any of these products before, you already have a Google Account. To sign in, enter the email address you entered on those products (if you use Gmail, it's your Gmail username). If you don't have a Google Account, you can create one when you sign up for YouTube.
Here are a few important things to remember about Google Accounts and YouTube:
- You sign into YouTube with your Google Account. When you sign in on YouTube, you enter your Google Account email and password. After signing up for YouTube, if you're already signed into your Google Account on a different Google service, you'll be automatically signed in when you visit YouTube as well.
- Deleting your Google Account will delete your YouTube data, including all videos, comments, and subscriptions. Before you can delete your Google Account, you will have to confirm that you understand that you're permanently deleting your data on all Google services, including YouTube.
- Older YouTube channels can be moved to a different Google Account. If your channel was created before May 2009, you can move your channel to a different Google Account.