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".  
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