Plug the hard drive into the TV or mobile device. I'm pretty sure mobile devices support USB harddrives these days, but I know for sure "smart TVs" do. If you prefer dumb tvs (as I do) plug an old computer into that. Or if you want to save power, plug a new computer into it. Or get something that supports DLNA (e.g. a playstation or I believe roku's and roku-like devices) and use a DLNA server on your NAS/workstation (I use minidlna, some people I know use Universal Media Server (cross platform GUI, GPLv2.)) Or use a more commercial DLNA-like solution such as plex.
There are many options here. That's one of the upsides of pirating non-DRM media. Storage is stupid cheap and anybody on HN should be able to figure out how to get an arbitrary mp4 file onto an arbitrary screen.
There are many options here. That's one of the upsides of pirating non-DRM media. Storage is stupid cheap and anybody on HN should be able to figure out how to get an arbitrary mp4 file onto an arbitrary screen.