Terraform

I am looking for a solution to share large video files securely to a single user. I have used bitTorrent tech for over a decade and have made torrent files with apps like transmission however I have never done a torrent that was meant for a single user and shared once. The reason I need this is I am having a hard time with internet stability issues dropping connections 1/2 through a 20GB file so basically that is what I want to do, share 20GB files using secure private torrent tech. Any advice?