I'm confused on exactly what the swift ban is. In the video, it seems swift is just the "protocol" between banks and the central bank of the country you're in.

At the end, he says international cross-currency transfers are done through "intermediate" banks like jpmorgan that has an account from a bank in the country you want to send to.

So I'm unclear what the "swift ban" did and exactly how it affected russia? Do the international transfers still use the swift protocol?