Official support for these "no-name" units is rare. Instead, users rely on repositories from the original board manufacturers or community forums:
There are two primary ways to flash firmware to a YT9260-VER1.1 board depending on its state. 1. Standard USB Update (System Working) yt9260-ver1.1 firmware
These forums host "SuperMods" and stock firmware backups specifically for MTK-based head units like the YT9260. How to Update or Recover Your Firmware Official support for these "no-name" units is rare