Now checked on Odroid C2 an image 5.76 with MALI and a media script, by a technique with replacement of u-boot, as for K2.
Everything works fine. After installing the script, the standard browser began to play video 1080 full screen without brakes. MPV is just as easy to handle any full-screen video. Bonus has an in-house sound via HDMI. There is one caveat when configuring - it is necessary to specify the correct DTB option in the file for Odroid C2 "/extlinux/extlinux conf".
1. Copy of the standard u-boot from the working SD card.
dd if=/dev/mmcblkXXX of=u-boot_odroid_c2.img bs=1M count=4
2. Burn the image Armbian for TV Boxing on the SD card.
3. Replace u-boot on the recorded SD card
dd if=u-boot_odroid_c2.img of=/dev/mmcblk0 conv=fsync bs=1 count=442
dd if=u-boot_odroid_c2.img of=/dev/mmcblk0 conv=fsync bs=512 skip=1 seek=1
4. edit "/extlinux/extlinux conf"
p.s.
By the way, LibreELEC with the new 5.1 kernel works just as well on Odroid C2.