: These refer to High Efficiency Video Coding. It allows for high-quality video at a much smaller file size than older formats.
Older devices (smart TVs, media players from pre-2016) may not support HEVC/x265 playback. You might need VLC, MX Player (with custom codec), or Plex transcoding. Parnashavarir.Shaap.S01.720p.HEVC.WeB.DL.x265.E...