YouTube Auto Subscribe is a Chrome extension designed to streamline the process of transferring YouTube subscriptions from one account to another. It allows users to import subscriptions using a backup CSV file, making it easy to maintain a consistent viewing experience across different accounts. This tool is particularly useful for users who have changed accounts or want to consolidate their subscriptions.

The usage of the extension is straightforward. Users first need to back up their data via Google Takeout, exporting their YouTube subscriptions from the old account. After logging into the new account, they can activate the extension, select the CSV file, and initiate the transfer. Users should note to set YouTube’s language to English or Chinese for optimal functionality and be aware that the transfer time may vary based on the number of channels being subscribed to.