The universal standard. It can play .mkv remuxes and open Blu-ray ISO folder structures easily.
While "Also Sprach Zarathustra" is the most recognizable piece, the episode features other notable music as well: Also Sprach Zarathustra, Op. 30 Richard Strauss : Used during the playground scene. The Bonzo Dog Band young sheldon s02e10 lossless
These are called files if sourced directly from the servers. They use modern codecs like H.264 or H.265 (HEVC). The universal standard