If you prefer not to use third-party tools, you can manually export your list and rebuild it. Export via Takeout Google Takeout , deselect everything except and YouTube Music , and specifically select subscriptions Download CSV
This method uses a dedicated Chrome/Firefox extension called (by Sike) or "Subscriptions Exporter for YouTube" . We will use the most reliable one as of this writing. If you prefer not to use third-party tools,
This is the fastest way to "import" subscriptions by using a tool to automatically resubscribe on your new account. Install a Transfer Tool : Extensions like Youtube Subscriptions Transfer Subscriptions Importer are designed for this purpose. Collect Subscriptions : Sign into your deselect everything except and YouTube Music