How to flash RKM V5 by computer

There are two parts videos for this job,pls check：
Part-1: https://youtu.be/o9CE88TXRuQ
Part-2: https://youtu.be/PDL0Tob9EJI

Link for Tool (factory tool_v1.63) & Driver(v4.5) :

https://mega.nz/folder/Wl41WIYL#FfxysWZuozNJgwOOJ8feXQ

Instruction:

What you need to flash:

FactoryTool_v1.63
Driver: DriverAssitant_v4.5
 
1.Driver installation
Open the folder"DriverAssitant", find and click"DriverInstall.exe",You will get below picture:
Press”驱动安装”

 
After Installation success, click ”确定” to exit.

2. Find the"FactoryTool.exe"from FactoryTool, double click.
A. Load the Img file
Click"Firmware"button

Wait for 5-10 seconds till the img file loaded, then select"Restore",click"Run"
 
Now the orange button changes to green.

Connect USB OTG with the computer via an USB cable, keep holding recovery button for 3-5 seconds till the computer recognize USB device, then loose the recovery button.

You'll get below screen:

This process needs 1-2 mins. when below picture appear,that means upgrade successfully.