150 views a day isn't all that much. I mean, of course, it's great compared to people getting zero views, and it shows you're doing something right, but you can push it much much further. In comparison, I've topped at around 2500 views a day with roughly 20 videos, and have several videos getting 150 views a day each.
I had a quick look at your videos, and let me tell you, you can do oh so much more. If you feel like spending more time on it, I suggest going to reelseo .com and going through all his posts and videos, and you might get an idea of what else you can optimize.
Frankly, any SEO you can do in less than an hour or two, isn't putting nearly all the effort into it that you can.
And a quick note for future reference:
When you say "first page of google and youtube", keep in mind that both are country specific, so others might not get the same results as you. If people (or you) have personalization enabled, even less a chance they'll see the same thing as you.
Not saying it's not great for you, it clearly shows you're doing something right, I'm just saying it's something to keep in mind for the future