.mkv (Matroska Video), a container that supports multiple audio and subtitle tracks.
HEVC / x265 (High Efficiency Video Coding). This allows for much smaller file sizes than older formats without losing significant detail. .mkv (Matroska Video)
Season 4, Episode 9—titled " Chapter Nine: The Piggyback ". Release Year: 2022. .mkv (Matroska Video)