Link to the channel In his videos he has done stuff like make a tiled roof hut with mud walls and a heated floor, made a kiln with a blower out of mud and clay, and made charcoal. Would stuff like that have actually be done when humans were still using the tools he is (Stones and sticks), or are they "newer" ideas done using primitive methods?
Here's a post from April 2016 that has a quite detailed answer. Obviously it won't include any discussion about videos made after that.
Edit - Including a mention of /u/RioAbajo in referring to the previous thread, in case he has anything further to add on the topic.
Not an answer, but you may want to cross-post in /r/askanthropology