If you are looking to watch the episode, the visual gags (Sheldon’s facial expressions, the library setting, and the car repair scenes) are essential. An .m4a file will likely only give you the sound, meaning you will miss the visual context of the jokes.
Here’s a breakdown of what that episode is, along with notes about the M4A format: young sheldon s01e08 m4a
Sheldon feels betrayed and decides to end things with Sophie. However, he struggles to break up with her, as he is still infatuated with her. Meanwhile, Mary's cooking becomes a topic of discussion, with George and Missy weighing in on its importance. If you are looking to watch the episode,