What should I do after buying a YouTube channel?

Right after taking ownership: change the Gmail password, update the recovery email to your own address, switch the recovery phone number to yours, and enable two-factor authentication through your own authenticator app or phone. From there, update the YouTube Studio details — channel name, description, profile picture, banner — if you want a refreshed look. Double-check the monetization settings in Studio to confirm AdSense is active and correctly linked. Finally, start uploading content that still resonates with the existing audience so you retain subscribers and watch time during the transition.