I'm not the person you replied to but:
1. I search for a topic and pick out a video that seems interesting.
2. I remember the names of the few YouTubers I like, and I look them up once in a while.
I do actually have a YT account and I'm subscribed to some people, but I rarely bother to sign in.
For me, YouTube is a platform for seeking content rather than a platform for being fed content (like HN or Twitter).