I'd like to migrate all my various google accounts into one so I don't have to remember five different ones (and also, some of these are kind of tasteless names that I made when I was a 14). The problem is that I don't want to risk losing my precious subscriptions by having to migrate them all manually. I have some basic python knowledge if there is an API i'll have to use to get this done.
This program can be used online to transfer subscriptions. The GitHub page has step-by-step instructions, as well as a link to video instructions.
This program can also be used online. Instructions are included on the web page, as well as a link to JSFiddle where the code is hosted.
The first option was last updated 3 years ago, and the second option was last updated almost 6 years ago, but both are free and worth a shot.
If you want to try to code your own solution, here's a link to the Subscriptions section of the YouTube API: