For subscriptions use RSS feeds.
Don't use youtube, they will throw you out of subscriptions over time anyway.
Every youtube channel has a RSS feed and there are programs to read these feeds automatically, like "QuiteRSS"
this here is for example the RSS feed for the channel "Rose Hannah"
https://www.youtube.com/feeds/videos.xml?channel_id=UCdfefMcA21PSXtGAx1vhjbw
That's for channels where you see or get the channel_id.
There is also this one, where you can subscribe to a user-id:
https://www.youtube.com/feeds/videos.xml?user=McBacon1337
There are also RSS feeds for bitchute.