Importing Subscriptions from YouTube
Open
takeout.google.com/takeout/custom/youtube
In "Select data to include", click on "All YouTube data included" and select only "subscriptions".
Create the export and download the zip file.
Extract subscriptions.csv from the zip file.
Select and import the file above.
Go to the Feed tab.
Click on the arrow on where it says "Subscriptions".
Save the file somewhere.
Select and import the file above.