If you have a , you can have multiple channels connected to it. When you switch between these channels, each one displays its own unique subscription list. You're not "transferring" subscriptions; you're just activating the channel that already has them.
SubShift: Transfer your YouTube subscriptions - Chrome Web Store
Using a is the best way to copy subscribed channels to another YouTube account. For the fastest, most automated experience, SubShift is highly recommended. For a manual approach, Google Takeout provides the list of channels, allowing you to curate your subscription list on the new account.
: Several GitHub repositories like YT-Migrate or YouTube-Subscription-Importer use the YouTube Data API to transfer data programmatically.
By following these methods, you can easily transfer your YouTube subscriptions to a new account, ensuring you don't miss out on your favorite channels' latest uploads.
Log into your old YouTube account and visit the Google Takeout page.