Regarding application issues; there is more than one way to skin a cat. My app page on my 55" uhd / hdr 4k 'smart' tv is empty, does not show youtube, but I do get netflix and amazon tv on it. My workaround for the lack of youtube has been to use my samsung uhd 4k blue ray dvd player, and to view Youtube from there. Not a glitch or a problem. Good luck with your issues.
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