chewitt thank you for your explanation.
The box image runs great for watching TV with tvheadend.
I just wonder how I write the kvim1 image to the emmc. AML burn tool tells me, that your image is not valid. And it does noch Boot from SD.
I would like to use mainline uboot as well
I believe you need to boot the device with the box img(or any other linux img that you can boot via USB or uSD), then download the kvim1 img to the device and then dd the kvim1 img to the emmc, instead of using the crap AML tools, since the the img is a raw disk img.