YouTube offers a sign-in option for users who want to continue using the platform without creating an account. To sign in without creating an account, users can select "Email or phone" and enter their email address or phone number. If they don't have an email address or phone number associated with their YouTube account, they can use a private browsing window to sign in. Additionally, YouTube provides a guest mode option for users who want to access the platform without creating an account or logging in. In guest mode, users will not be able to save their login information or create playlists, but they can still watch videos and access other features of the platform.