Hey Darren. The "pop" in your niche is probably harder than mine (video game), but the strength in yours is longevity. Your information will be relevant for a long time compared to something like mine.
I had a couple "pop" moments. One where I did a heavily edited and entertaining video which has the most views by far. The second is very recent and quite frankly, shocking. I have been doing giveaways in game which has been getting me a good amount of subs each week, but this past Friday I announced a video card giveaway. I was at 320 subs on Friday, and am currently at 935 as I write this... and still growing. Since I established myself in the community and also gained a reputation for giveaways, I think this helped give me credibility. Everyone loves hardware, but they'll love it more from someone they like and trust.
Another element that I forgot to mention is that I incorporate a more comedic element in my videos to keep it entertaining, while still making sure I have data and evidence to support what I'm talking about. This may not be your style, but it seems to work for me because my niche is pretty dry.[DOUBLEPOST=1539609875,1539609320][/DOUBLEPOST]
I think this hits the nail on the head for whatever genre you're giving something instructional. I like seeing some personality and connection to what I'm looking for, but I also want the relevant information. My niche is pretty dry, and a couple youtubers stand out because they seem to have that balance. Coincidentally, the #1 youtuber for my game is the one I think epitomizes that the most, and is probably my biggest inspiration for what I do.