• Was it interesting? (subjective I know )
I, at least, think this was very interesting!
• Was it engaging? (If not, what should I change?)
I think: yes. The composition and planning were great although, obviously, you could always improve a lot.
The thing you should try and do in the future is to try and make people who might not initially be interested in the subject still like the video, and after the video be interested. I also think you should more clearly explain what it is as if the audience has never heard the word before.
• Could you understand me? (I know I race through ideas sometimes XD)
There were a couple of times I felt you spoke a little fast, or there were some words I could not understand. I recommend you try and speak a little bit slower, and more clearly.
• Will this be a video type you would want to watch again? (If not, why not)
Yes... and no. It really depends. I personally really enjoy this kind of educational videos, but not under every topic. But you should definitely make more of these if you enjoy it!
• EXTRA: Does this fit with the rest of my videos? (You don't have to answer, as I understand it will force you to go and look at my other videos, but if you have the time, I'd be grateful for an answer )
Yes, I do think it does fit in. It might be a little different, but it's great to have some variety in videos on a channel.
All in all: It's a good video, and you should make more!
After a while, you'll get even better.
This was just my opinion, and I might be wrong on some things, I'm just trying to help out!
Oh, and also, maybe add some ambient music that follows the "tension" in what you're saying? Might make it sound more professional.