No matter how much training you have, no matter how much gear you have, no matter how "prepared" you are for everything - you are never completely 100% prepared. Sometimes having too much gear with you can even become a hindrance.
One of the primary pieces of kit a person needs is their own mindset. It doesn't hurt to learn how to become a "MacGyver" either. Learn how to think outside the box in an emergency situation. Don't completely rely on "stuff". Basic outdoor and survival knowledge like you learn in Boy Scouts is good.
There have been too many times entire vehicles, complete with gear, have been lost with no hope of accessing the gear inside. There have been many times when people have been well prepared and have found themselves stuck, with no hope of reaching it and end up cutting a body part off.
Don't get me wrong, everything in the vid is good, and you'd be insane to go on certain treks without at least the basics; yet too many people come to rely on gear and are clueless without it.
Fortunately most people will never be in such situations.
An example from the video - changing the tire. First off, if you don't know how to change a tire perhaps you shouldn't be doing this. Learning to change a tire when the weather is nice, it's daylight and so on is one thing; take it to the next level. Change your tire at night when it's freezing; do it during a torrential storm; and etc. Learn what to do if you can't change the tire - what are your options.
Most important of all - know your limits, mentally, physically and knowledge/skillset wise.