So, I got curious about Reddit, so I peaked around the site, read the rules, liked what I saw and made an account. I haven't had time to actually be active (since I'm working and I made the account yesterday), but I already have the feeling that people are approaching this medium wrong.
It is not a site for promotion. It is a forum. And every forum has a community. I've been a big forum user for the past 12 years and forum communities are a thing in itself.
Approach Reddit the same way that you should approach this very forum, YTtalk. Use it to ask help, to provide help and to talk about your interests. Along the way people might check out your channel, or you will be able to post a link or mention your video. I looked up subreddits for TV shows I like and the sport I do (HEMA). Connect over similar interests, not focussing on subs and views, but with networking in mind. Build a community, that's what forums are for