I'm not able just now to watch the video.
May I presume the concept is to live like Thoreau, apart with his thoughts unfettered by cares of the world?
I tried it once, early in adulthood. It is an absolute relationship killer...I never met a woman willing to give up and forego a modern bathroom.
On the chance there may be an exception, a Boy Scout Handbook from at least 50 years ago, older is better, will provide some basic instruction for living off the land. Each lesson would then require more in depth study, but the basic concepts of water, shelter, food and medicine / hygiene are there in a basic and practical format.
A fiction book that inspired me greatly as a youngster is "My Side of the Mountain," a young boy goes off into the woods and makes a way to live alone, living in a hollowed out tree. A movie was made in the late 1960s, and while good, it, like so many others, wandered from the book and glossed over or left out some crucial points.
For many years in the 1970s and 1980s, a magazine called Mother Earth News was awesome for "back-to-the-landers." If one can get past the neo-hippie commune aspect, there were some intriguing and innovative solutions to basic problems of self-sufficiency. Later, the magazine sold and that underlying philosophy disappeared and it wasn't as good anymore.
I learned of a series of books through Mother Earth News called Foxfire. I think they were done by the editorial staff at M.E.N, by interviewing old timers still living in Appalachia circa 1970-72ish. I think there were 9 or so volumes eventually published, but I focused on the first two, which have the bulk of information for living "old style" prior to electrification. Issues such as butchering a deer or hog, building a log cabin, preserving foodstuffs (canning, root cellar), etc, are covered in depth.
What one finds is there is always work. Nothing comes easily, things we take for granted like clean drinkable water are a chore to do yourself. And once one chore is finished it is time to take up another...there is always something else that needs to be done.