https://youtu.be/JChGUTKARps?feature=shared
One of the enterprises is from my hometown, my nanny worked at it
In short, it is talking about three companies, a fish canning factory, an agricultural cooperative and the Mao Zedong Factory, which manufactured the first sanitary vans. It briefly presents the companies and their performance.
I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy: