It was a bit drawn out. You either need to split it up in about five parts or you need to shorten your descriptions and ideas. I honestly was getting bored by watching it and you kept basically repeating yourself a couple times before moving on. The information was wonderful and accurate but most people won't take it all in because it was, to be brutally honest, boring.
What I would do is write down all the information you want to present. Cut out anything that seems like you're repeating yourself(this isn't a one-on-one lesson, they can watch the video over and over). Take that paper and use more descriptive terms and proof read over and over. Now use that paper as a script. That will cut out wasted time where you were thinking of how to describe what you wanted to explain and going back to something that you didnt finish explaining.
Once again, you gave great advice and wonderful explanations but it just doesn't work in a video format. For a first try at an education youtube video, you did a wonderful job. Please don't take my criticisms as anything more than advice to help your presentation. It would work well explaining it to someone in person but for a video you should be a bit more brief and to the point to keep the viewers attention.
That's just my opinion.
What I would do is write down all the information you want to present. Cut out anything that seems like you're repeating yourself(this isn't a one-on-one lesson, they can watch the video over and over). Take that paper and use more descriptive terms and proof read over and over. Now use that paper as a script. That will cut out wasted time where you were thinking of how to describe what you wanted to explain and going back to something that you didnt finish explaining.
Once again, you gave great advice and wonderful explanations but it just doesn't work in a video format. For a first try at an education youtube video, you did a wonderful job. Please don't take my criticisms as anything more than advice to help your presentation. It would work well explaining it to someone in person but for a video you should be a bit more brief and to the point to keep the viewers attention.

That's just my opinion.