We don’t, the assumption is that because the box sets were bought from eBay that they’re bootlegs. Also some of the dvds appear to have been written with a software associated with dvd ripping, so that’s another interesting coincidence. But not all crappy dvds he looked had that signature.
But we don’t know 100% they’re bootlegs.
It’s a quote from the Shawshank redemption.
Brooks was here