Someone on the Hacker News cross-post mentioned it, but it seems like they assumed any ARM Linux device that wasn't detected as running Android was some low-power device like a Raspberry Pi, and didn't anticipate more powerful devices running bog-standard Linux until Apple Silicon and thus Asahi came along.

It's probably the case that this was good intent given the lack of desktop ARM computing hardware, but they really should let the client decide the video quality.

Apple Silicon has entered the chat