This naming convention is standard for digital media files shared by "Scene" or P2P release groups:
Episode Summary: "A Computer, a Plastic Pony, and a Case of Beer" Watch Young sheldon s01e12 hdtv x264-sva -1
: Refers to the open-source library used to encode the video in the H.264/MPEG-4 AVC format, which provides high quality at relatively small file sizes. This naming convention is standard for digital media