I was sent this model 2\16 for tests. I have on this model, the image (from the kernel-4.18 directory), works with the dtb file for Khadas VIM1 (test video works with sound). But there is a nuance to run versions with DE Mate\Xfce. After the initial setup, when the system automatically reboots, wait at least 5-7 minutes, at this time the screen will be black, then use the combination Ctrl+Alt+F1 to switch to the first (text) console, and then switch back to the graphical console Ctrl+Alt+F7 and wait 2-3 minutes. After such manipulation should earn DE. Write me in PM your email address, I will send you a link to the image LE kernel 4.18, which is already partially working ffmpeg with HW via v4l-m2m. This image works for me on X96mini as well. It is possible to take the files you need to port to Armbian.