A few things to note:
1. The pinned comment with this video on YouTube tells us the shelter was built on private property. So this isn't a case of someone going onto public lands, building a shelter and asserting ownership
2. Comments on Youtube suggest this shelter is in Austria. Also note that materials include more than things found in the wild.
All true, but those points are the reason why I was asking questions in the first place. Now I know that building shelters 'bushcraft style' on public land is highly considered to not be a good idea and my future camping plans would have to adjust for that.
The Survival Lilly's scenario is similar to my hypotheticals primarily because of the expected remoteness of the bushcraft shelters. I guess that it was quite virtuous of her to be tolerant of drunkards on her private shelter (different situation from her stalker).