http://nuclearcdboxafziza4mgohcwhzfjiyg6zeslnry33pepsgtur2wyeyd.onion/social/thread/792.html
In YT's case, I use Invidious (somewhat broken, consider alternatives) and its RSS feeds to subscribe to certain channels without having to visit YT.
RSS feeds are great, I used to get on a computer/phone and just cycle between sites I was interested in. Visit, there's no new posts, try the next, nothing, visit another, it's junk, and keep going until it's been so long I feel like checking the first again.