I'm slowly growing my youtube channel but I take so loooong doing videos that the algorithm will never help me if I can barely upload one video a month, still for me videos are long time projetcts taking lots of effort and I'm just trying to start uploading more "candid" things. I need to break through that "perfectionist" in me because I agree that consistency is the key, same happens to me with Inktober when I participate it forces you to make a sketch once a day :) so I welcome it though last year I was lazy and skipped hahah
LOL. Your case is probably a little different since you make such intricate stuff. Your YouTube videos could be more candid things like you said - behind the scene type things. You know there are dozens of thousands of people that would love to do some of the things you do but don't know how. You can do little micro tutorials and vlogs. Vlogs could be about how you're proceeding with an ongoing project. What are your set backs, etc. People love stuff like that.
I started filming some of my nature hikes and even started to edit a few but then It was always taking forever from what I really had to finish, still I intend to share a few of those. I also want to do a few "wip art while drawing" but I try not to deviate much in my channel, trying to build slowly to 10k which enables me to share stories which can be more candid on the moment things. Definitely will do some behind the scenes for patreon, though I confess patreon is not working for me, I'm not having people joining it so dunno if I'll keep it, so far it's been (except for some close friends) a discouraging "experiment"