The YG300 is a budget pico/mini LED projector popular for portable home use. A software or firmware update for this device typically aims to fix bugs, improve stability, add codec support, optimize battery and power management, and occasionally refine image processing (color balance, sharpness, scaling) or add user-interface features (menus, input handling, remote key mapping). Because the YG300 line is produced by multiple generic manufacturers and resold under different brands, update frequency, delivery method, and release notes vary widely.
If you want, I can:
Do not try to download an app to the projector. It won't work. yg300 projector software update
Since the internal software is limited, the best way to "update" the YG300 experience is to bypass its interface entirely using external hardware: The YG300 is a budget pico/mini LED projector