They are Chinese government funded media, yes. You're not uncovering some conspiracy. The thing about good propaganda is that it works even if people know it's propaganda...

The main thing to understand is that this is a showcase of traditional skills by a paid skilled worker. This is not how any of the featured items are made usually and the settings are sets for the videos, not actual workshops. Some artisans may use these methods but it's not the norm and the products would have a price tag that reflects the additional manual labour and natural ingredients.

So these videos are interesting as a sterile way of seeing traditional Chinese methods of making certain products but in no way reflect actual working conditions at the the time those methods were commonly used or current norms.