They seem to be using https://www.eternum.io https://www.eternum.io to "pin" the file (keep a copy of the file alive). Since eternum is a paid service they migh

They seem to be using https://www.eternum.io https://www.eternum.io to "pin" the file (keep a copy of the file alive). Since eternum is a paid service they might unpin after a while but it's up to them. If they didn't do that, the file might only be available as long as your browser is open.