Yeah, the idea was to push the users to add channel manually (i skipped effort to minimum) however i do consider an option to log in by Google account and import whole sub list. It will give to user his own constellation and also add channels to main list. YT is very restrictive for API quota and scrappers, so I'd preffer to avoid this second option
Although, it looks like this relies on user input rather than indexing existing channels. Wondering if that's unfairly negating channels simply through omission.
I like it though. Hope you can get the momentum it needs to help it grow!