mpeg2video but the one that only has audio and flickering video is SD
I checked your video. To play in EGL mode + OSD menu, simply disable hardware decoding (the line in the settings above the OSD.using EGL\DRM). Video of this format is easily processed in SW mode (the performance of the chip is quite enough for Full HD).
The question about the emmc install was about the stability. Each of your builds has a new OS and new Kodi which is fine. In the past I have had trouble with the bootloader changing so I couldn't just put the current tar file in .update. Is that now possible? I am reluctant to do this because the emmc stops works and I have to then flash Armbian to SD, write to emmc then load LE then copy LE to emmc.
The problem is not the update, it's a problem with the latest kernel (does not work with eMMC).