BTFS allows you to mount any .torrent file or magnet link as a read-only directory in your file system. Files are downloaded on-demand as they are accessed. Common tools like ls, cat, and cp work seamlessly with BTFS, as well as media players like vlc and mplayer. Installation guides are available for Debian/Ubuntu, Arch Linux, Gentoo, Fedora, OSTree, OpenSUSE, and macOS. Dependencies include fuse, libtorrent, and libcurl. Building from git is an option for recent Debian/Ubuntu systems. Installation on macOS can be done using brew. For those interested, step-by-step instructions for building and installing BTFS are provided.
https://github.com/johang/btfs