TL;DR recommended setup: Use a PO Token Provider plugin to provide the mweb client with a PO Token for GVS requests. See the notice in the YouTube Extractor Wiki for ...
yt-dlp is powerful, but its command-line interface can be intimidating. yt-dlp GUI wraps it in a clean, native desktop app — no terminal needed.
The first, slightly lengthy way to do this is using the subscriptions manager of your YouTube.com account. The process is not automated, but it gives you a list of all the channels you’re subscribed ...