OK, so I just watched a few of your videos. Here's how they strike me.
First, there is no horrible aspect to them.
Most people making their first stab at YouTube videos have at least one thing that is completely bad and wrong - music, voice, volume mix, frame rate, editing, intro, something
- but there is no such problem in these videos, so you have a solid technical basis for creating more content.
Second, they're clear and competent. You present your information very well, It's clearly laid out. You are showing the information on screen as you go, you speak clearly.
Third, they're not very entertaining. You may be in the business of presenting information, but YouTube is a medium that sucks its audience in because they are happy enough to spend a few minutes nodding along, even when they don't need to.
Just to check my intuition on this, I watched your Durian video https://www.youtube.com/watch?v=hNrB2uNe67s alongside the Hazelnuttygames version https://www.youtube.com/watch?v=iA2PA_zmfFM to break out the differences. Now, it's not really a fair comparison, because she is a very experienced YouTuber, but I think if you isolate each element of your video vs. hers it may suggest some ideas about presentation and framing.
And now what I see as your biggest problem: the content itself. Or perhaps the timing of the content might be a better way of looking at it. Legion is over, and the pet battlers and collectors who read these forums are either already doing these battles every day for charms, or have already got everything they want to out of them. Hazelnutty and Cymre Jones have how-to videos available, and a search for Durian Strongfruit https://www.youtube.com/results?search_query=durian+strongfruit gives me 997 videos. There is no possible way to get people excited about a new video dealing with this content.
Almost harder to overcome than the datedness of the content is the fact that the core information about these strategies is better presented to an experienced battler in text, and Aranesh over at XuFu's does an incredible job of keeping on top of known strategies and presenting them in a way easy to integrate with Rematch. You can't really compete with that. Perhaps adding text below your video description with the pets, breeds and directions that a viewer could copy and paste into their Notes field might add a bit of value?
That is not to say that videos aren't worth doing. Less-involved battlers who don't suck a strat in in a few seconds often find videos a great way to absorb the information. That, btw, is to my mind the thing that Hazelnutty does very well. Even though I could whip up a dozen strats for any of those battles on the spot myself, I'm happy enough to spend three minutes just nodding along because it's pleasant.
What would I suggest for you?
For a start, keep going! The more content creators we have, the better. You have a method down pat. You can no doubt learn some techniques to improve your entertainment factor, if you're interested in that.
After that, it's about what you want to do.
Basic two-pet strategies are a dime a dozen, certainly at this stage of the expansion. You can and should keep going with them, though, with an eye to practicing your presentation and skills.
You'll be eaten alive in PvP unless you really know your stuff.
Guides for getting pets? Your Pebble guide again showed that you can present the content clearly, and that's something newcomers to the field might appreciate. The problem is that off the top of my head I can't think of any interesting cases. There's Uuna but that's been done to death recently.
It's just hard to find subjects for interesting content at the moment, since we're in the doldrums at the end of the expansion, and everything has been done.
If you can score a Beta key, there will be a rich vein of new content when Blizzard unveil the new pets in Battle for Azeroth, and that would obviously be a great opportunity.
Anyway, I wish you luck, and I hope you find a vein of content that you are interested in and can pursue.