Firstly that was a great video, I usually judge videos by how much I don't notice the time go buy and the 7+ minutes of the video went by without any notice at all.
Also, the concept in the video is technically correct, people are averse to taking risks and feel losses more than they feel gains.
Even if you consider the analogy of this being a stranger those people just met and then flipped it, offering them ten bucks to take a gamble, while risking nothing, people would take the bet with the said stranger.
That is still a too good an offer to be true and it's still a stranger they just met, but with no apparent risk of losing, the would take the chance at winning.
This is one of the reasons why Bitcoin adoption is so low. Everyone is aware of volatility, of big rallies and big crashes. Avoiding big risks is the default course of action for most people, even if big risks have positive expected value.
Bitcoin adoption is not low for how long it has existed.
It's more than taking a random bet, it's accepting a new way of doing things, a new way of transacting and a new form of value. It would definitely take time to be fully adopted