1- Download the latest generic build 20.5 (21 does not work well for now)

2-  Download balenaEtcher-Portable and flash the generic build image to a flash drive.

Some cheap flash drives will not work. I use this one

3- Download and copy this file into your flashed drive folder

4- Go in your flash drive folder, into the device tree folder and copy your box version file (AM6plus or AM6Bplus) file to the main folder and rename it dtb.img

5- plug into the usb port and boot the ugoos.

6- see recommended settings

*** I personally use the Composite plex addon. This has worked well for me so far.