YouTube uses lower quality options on browsers running on Arm-based systems — misreporting as an x86 CPU appears to be a widespread browser fix
by from Latest from Tom's Hardware on (#6H34S)
A developer found YouTube changes the quality and resolution options for 'aarch64' Arm-based systems under Linux, and changing the user agent string to indicate an underlying Intel CPU delivered better video quality defaults and unlocked 4K playback on Apple systems with Arm-based architectures.