I'd still post on Youtube every day or as often as I could if I were you. Also, it doesn't hurt to occasionally promote yourself on Facebook. I do believe that YouTube and Facebook are dieing platforms though. I see big time cable news and media companies taking over YouTube. At least that's what I've heard and the arguments supporting it seem plausible. YouTube rules are becoming less and less friendly towards the individual content creator. Even a lot of the YouTubers with a few million subscribers have seen a drop in their views.
Regardless, as a content creator, you've always gotta work your butt off to post relevant content. Constantly gotta keep upping your game. There's just way too much content being created. The competition is crazy.