Hello
It's a nice video, but it lack some more technical terms and how does it work in terms of programming and stuff.
I agree. You should have focused the explanation more about Bitcoin than any other cryptocurrencies. The video should tackle how Bitcoin came to be then how it works, why will they use it, the purpose, what makes the price's volatility, how does it go when you do transactions. Also you could have introduced some terms that newbies commonly hear so they can understand it.
You might as well consider adding subtitles to make it much clearer and easier to understand. Also you can consider adding how you can have Bitcoin like buying it and ways to earn it or you can just make separate video of it and just leave the link at the end of your video.