Use remote control? Hehe
Look for Netflix app or YouTube app. Search for 4k. But the display tv may not be connected to internet/wifi. Some people bring their own usb drive with 4k files. But maybe u need to know if that tv have media player app. Best is from now on if u wanna know anything about any tv, can Google and download the instruction manual to read.
Not really, FHD/QHD/UHD, and 2K/4K/8K are actually 2 different things, to be specific. Usually UHD is equivalent to 4K. FHD is full HD 1080p resolution, not 2K. 2K is not official, but it can be considered as QHD which is 1440p.
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