Several web-based tools and browser extensions claim to automate the subscription transfer process. These tools typically work by reading your exported CSV file and then using a script to click "Subscribe" on each channel via your new account.
To move videos: You must download them from your old account and re-upload them to the new one. Several web-based tools and browser extensions claim to
To move playlists: Set your old playlists to "Public" or "Unlisted," share the link with your new account, and click "Save Playlist" to add it to your new library. Several web-based tools and browser extensions claim to