The "Brisket" scenes are the stress test here. The texture of the meat, the glisten of the fat, and the foil wrapping create complex patterns that can often suffer from macro-blocking in lower-bitrate encodes. In a standard libvpx rip (assuming a standard Web-DL bitrate of 1-2Mbps), the encoder holds up well. However, if the bitrate drops too low, the smoke in the opening BBQ scenes can exhibit slight posterization.
The team leader looks at Sheldon skeptically. young sheldon s01e06 libvpx
MARY: (skeptically) Sheldon, you're not exactly... athletic. The "Brisket" scenes are the stress test here
TEACHER: (impressed) That's correct, Sheldon! the glisten of the fat
INT. HIGH SCHOOL MATHEMATICS CLASSROOM - DAY
SHELDON: (excitedly) It was great! I made the football team and I think I can help the quiz bowl team win!