Here's my thoughts, for what they're worth! I think you are maybe being a little hard on yourself, you have a very good channel going on there. It's a niche subject (same niche as I'm in), and of the channels in that niche that I've seen, only Vinyl Rewind is beating you for subscribers, be proud of that. You're maybe getting close to the ceiling of what a channel in this area can do, we're never going to be getting PewDiePie subscriber numbers! Despite being potentially close to the ceiling, I can see you're still over the last 30 days consistently getting more subscribers per day than me (and I'm supposedly a growing channel), except for about 3 days around the release of the Abbey Road remix when I had a good boost in subscribers. Your videos are undoubtedly well made, good quality and enjoyable. What I don't understand is why YouTube to my knowledge has never once recommended any of your videos to me, so I've never seen them before. Maybe now that I've clicked on your channel and some of your videos it probably will start doing. So you are certainly at the mercy a little, as we all are, of the YouTube algorithm, which for whatever reason isn't promoting your videos to me as someone who regularly watches that type of video. If you want a tip it would be, if you've not done this already, to read up on how to drive more views and subscribers, maybe follow the advice of someone like Nick Nimmin To sum up, I'd say relax, you seem to be doing about as well as anyone in this topic can be doing. If you're not growing much these days it's likely that there's not much more scope to grow in this area. If anyone fancies giving me any constructive criticism on what I could do better, let me have it - https://www.youtube.com/channel/UCkDCZnGoiha9rXhuhMR3auw?