Did you know that your "Subscriptions feed" is actually just a list of channels? But you can also train your new account's algorithm by transferring watch history and playlists .

: YouTube has "soft limits" on how many channels you can subscribe to in a short period. If you have hundreds of subscriptions, the process may take several minutes, or YouTube may temporarily block further subscriptions. Method 2: The Semi-Official Way (Google Takeout)

: This popular open-source tool allows you to "collect" channel IDs from one account and "subscribe" to them on another in a single browser session.