Fixed the first video a little bit according to friends’ feedback. If you leave a feedback, I appreciate very much!
Added reference at the end. Recorded again some parts. Changed some pictures as well. It took more than what I expected to fix.
After checking Youtube auto-subtitle, obviously in some parts my pronunciation is not clear. Therefore, I added English subtitle. Hopefully, people understand what I say, at least.
I am impressed how technology makes easy making the video for non-professional ordinary people like me.
source: Sustainability Harmonist, the 2nd edition