I started my Facebook page- Facebook group, and YouTube channel at the same time. I have 23,000 page follows, 9.7 group members, and an 8,000 YouTube channel. There is nothing stopping you from promoting your YouTube channel on Facebook as long as all the accounts are officially linked. I do have a news website with 1000 readers daily. Facebook milestones are harder to achieve than on YouTube, so most of the time you need organic and paid ads when starting. On my Facebook, I have different types of content: my news media, which is linked from my WordPress page linked, my family holiday and daily life uploads, which I promote, my early morning rant videos, which I do 3 times a week talking about issues that are trending in the news, and finally, any of my YouTube videos are uploaded at the same time on Facebook. Now I also use Tubebuddy to social sharing to share my YouTube videos on all my Facebook handles, Twitter, Twitch, and even LinkedIn. I pin the YouTube link posted on Facebook so that people see it as they come to my channel. This has worked well for me over the years, though I will say with the changes I have had to adapt some of my strategies. So now the videos I upload straight to Facebook, I place 2-day ads for £2, which gives me the traffic for Facebook. Having said this, my traffic source on my YouTube channel is in this order: Google search, Facebook, Twitter, Google, then YouTube suggested.There is no one answer that fits all on social media. All I have learnt and am still learning is that we grow by trying stuff until we learn what works for us.