With YouTube, you can create personal pages to display and upload videos of your choice. You can also select a unique user name that may be different from your account email user name. If you need to find a friend or acquaintance on YouTube, you can search for them by using their email address with YouTube's user search feature.
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Log in to your YouTube account by entering your user name and password.
Click the link on the YouTube homepage that reads "Find Your Friends on YouTube."
Type their email address when prompted.