Can't believe I actually watched this garbage vid, but the thumbnail doesn't make clear that the 4x4 is STUCK, and the rest of the methods other than tunnels, which are labor-intensive and easy to shut down when found are only good for small packages.. In other words, a wall is awesome for stopping people, which is the main point.
This vid is garbage, your argument is garbage, and the fact that you're here making it makes you garbage.