My money's on someone running a Plex server (or something similar) on their own machine, then going to reddit and saying "I have a copy of [X], you can watch it

My money's on someone running a Plex server (or something similar) on their own machine, then going to reddit and saying "I have a copy of [X], you can watch it here:" with a link to 127.0.0.1 (since that's how they watch it, so why wouldn't it work for anyone else?). I.E. We're dealing with the intersection of an automated framework with a "normal."