Hm Nice video. Great to watch your video. The video was so engaging and I keep watching video till end. But the thing I was missing your audio in the video. The audio in the video was not that much great as required. Hence you need to test the microphone (if use to record) before recording audio.
https://mictest.me will help you to carry a mic test so that you can identify the errors in your mic and fix it before recording. The tool is easy to use and no need to download third party application for testing process.