Admittedly NOT tied directly to this thread (the videos)
I've always found it interesting, the practice of most societies and the more primitive aspects of religion (shamanism) and the quest for "enlightenment" involves a flirting with death, oft times taking the neophyte right to death's door by way of ritual fasting, suspension and the use of this and that herb-based combination; the hallucination being needed to help them "see" and the "sickness" (coming near death) brings about the psychological elements that more or less force the hallucinations to fit a particular form or theme if you would.
Most all NDEs involve a cultural reference which is why, as someone that's a strong advocate of the paranormal, I believe there is far more to the situation than antiquated "faith-views" and superstition allow for. My personal philosophy being that one MUST couple the rational with the metaphysical in order to find the "truth" for what it is rather than what we want it to be. In other words, "Why" do those raised in an Islamic culture see Mohamed or Abraham instead of Jesus Christ or Krishna or any of the other godheads found around the globe in the many religious & social cultures? This fact alone gives us some very strong support to the fact that NDE scenarios as well as aspects of Astral Projection, are purely psychological in foundation, but affected by our own biology and subconscious programming. This doesn't mean that such experiences have no purpose or impact for the people that experience them, only that they need to weigh the rational perception along with the mystical so as to "ground" themselves and not become overly zealous and falsely suede/converted because of them.
I've done a lot of research and actual rituals that involve Astral Projection and induced NDE type conditions via legitimate setting as well as participation in certain 1970's Kool-Aid & Sunshine parties of the day
This is something that has strong interest for me because of childhood experiences and my need to gain a better understanding of them; I simply can't take things at face value and from what I've learned over the years, such is the folly of most who think themselves to be "on the path" -- they blind themselves to the simplicity and "mundane nature" of it all because they need it to be "more".
Research has supported the fact that those of us that "experimented" with "Mind Expanding" elixirs of the day, frequently improve their mental agility so to speak; they are able to see things from multiple points of view and create very bold and imaginative "solutions" to challenges set before them be it an engineering & design issue or social-political debate. Understand, I'm speaking of those that were moderate party goers rather than those that develop a need to escape and exist in the faux world such chemistry allows us to know. Regardless, what scientist has seen in those that partook of such things 30+ years ago seems to mirror the manifestations spoken of when it comes to the Initiated pilgrims that successfully progressed through the varied levels of mystical teaching.
These "rites" of initiation are spoke of in nearly every culture & religion, including early aspects of Christianity; their "danger" progressing the further into the mysteries one successfully travels. For an example, the first year neophyte of certain shaman cultures will face acts of extended fasting, the sweat lodge, certain suspension rituals and even fire-walking on a progressive basis that helps them learn on several levels, the most important being identical to why Anthony Robbins has patrons walk on the coals BEFORE they come into the seminar -- it teaches confidence and the realization that you can move beyond your fears and self-imposed limitations. If we look at most any religion, we can find similar suggestion such as the myth within Christianity when it comes to enduring hardship and suffering and even poverty while in this world in order to reap serenity in the after-life. Though the dogma around this false-teaching had ulterior motives the lie actually empowered followers in much the same way fire-walking and such "emboldened" the wannabe mystic.
Yes, there are some physiological oddities tied to death that seem to support the idea that a physical soul or something leaves the body at the moment of actual death (bodies actually loose several ounces of weight and a 'wet' substance manifests at the top of the head as well as the "3rd Eye" area of the forehead and the Solarplexis region of the body itself -- the three "key" chakra points associated with higher-being and spirit). I can't explain the phenomena but I will admit that it is one of the reasons I will leave the door opened a bit when it comes to the idea that the soul is real and does survive physical expiration. Beyond that I can only rely on theory and supposition in that science has YET to move with the soul on its journey into that altered state and alternative reality that I truly believe exists and science will, possibly within the next century or two, give us a way by which to not just witness it, but gain a more tangible understanding of it.