Frogboy comment there:
How I got a some Chinese people to make my own iPhone - in China
Lol! Very interesting video, more about the tech scene in Huaqiangbei. Reminds me of the personal computer scene on the west coast of the USA in the late 1970s and early 1980s, with people dabbling in building personal computers, buying and selling parts. Only these parts are much tinier.
Really cool. . .
I used to buy dead iPods on eBay and cobble together working iPods, back in the day. It was pretty simple, really. Not much to them.