Download Android KitKat 4.4.2 Stock Firmware for Vido M8 / YuanDao M8 tablet from here or here. Download Vido / YuanDao firmwares from here.
Update file name: M8-4.4-20140111-ZZ
Archive size: 262 MB
Image: M8-4.4-20140111-体验版
Model: Vido M8 / YuanDao M8 tablet ZZ model
Platform: Rockchip RK3188
FW version: 4.4.02
Boot version: 2.08
ADS HERE !!!