4K videos can also be played at maximum 1080p. Your A53 only supports 1080p anyways, so should'nt really be a problem. Because your A53 has a Full HD Display and not a 4K Display. Although if your display is limited to 1080p it doesn't matter to wath video in higher definition, you won't feel a difference.
I also have a j7dou but it's support 4k on youtube which has also full hd panel......a 53 I capable of 4k recording and playing then why not support on youtube.....I want a solution
Exynos 1280 Processor has not capable to play 2160p [4k] video but only record video through camera app . Its hardware issue As per answers on Samsung mambers app older discussions.
As per your concern, we would like to inform you that your device does support Video Playing Resolution UHD 4K (3840 x 2160)@30fps. So, your device is eligible for the 4k video resolution but the app contact also should support the same resolution, however, kindly contact the particular application helpline once, to make sure there is no issue from their end.
