It's going to have to be forced down there throats, it shakes Mises's regression theorem at the core. At first I couldn't accept it but the earlier linked video sugar coats it and makes it taste nice.
This changes nothing. A person living in a non-money economy will take something of value when he goes to a merchant to have some painkillers. How do we know this? Because it is going on today. That is barter. It also happens for other reasons, like tax avoidance, and if two persons just happens to both have something of value that they don't need. No mystery.
Gift economies is live and well in stable, tight local communities. It is debt, it is based on trust that you will get something back when you give. People think this is nice; I see some problems: The community has to be exclusive to have this level of trust. There is always a black sheep that is exclueded, also newcomers, and it falls apart when there are turbulent changes in the group. Also the payments are not exact, so some individuals may sacrifice themselves too much, others can get away with very little production (if they are pretty or smiling or lying or somehow can believably hold forth that they are worthy receivers).
Historical seasonal markets based on debt has been envisioned, don't know about hard evidence but it is completely likely. In a money-scarce economy, people meet to trade, and temporarily use a ledger to enable trade, and clear out at the end of the market. Debt based markets using promissary notes is even better and can be used anywhere today, and is used where bank loans are hard to get. Privately issued "credits" are used in local markets all over the place, for example nowadays in Argentina. Denoted in the local government currency, but has normally a lower value. They are usable due to "localism" and "big corporations fucked-us-ism", and possible due to misunderstanding of what money is.
So this is nothing new, and not contrary to austrian money theory. Debt is an extension to money to some degree, the easier transferable the more money-like. The money supply that ultimately decides the prices (together with demand to hold) is the combined supply of money plus debt.