Same here. I live in the United States and own a UN60JU7090FXZA. Every time I watch a 4K video on YouTube, my playback options max-out at 720p. (I had no idea framerate played a part until I came upon this thread though.)
now i watch YouTube and see that everything is back to normal. So now every video works in FULLHD or 4K Check your TVs and YouTube app to see if it's back to normal
Unfortunately, I'm still experiencing the same problem. 4K videos running at 60fps can only run at 720p.
I've already contacted YouTube last week using the link you posted.
Same problem happens with UE40JU6400 model. YouTube Samsung app plays 4k@30Hz, FHD@30Hz, but nothing above that framerate. Nowadays every single youtuber posts videos at 50Hz and they are not supported by Samsung YouTube app. I fell bad for my TV, I don't want to replace it, I understand marketing, I have 3 Samsung TVs, I think I am your client and you should be nice to your clients. Thank you Samsung, for bad suport.
Same issue on my Samsung UE50JU6800 television, never used to be an issue in the past - most videos now limited to 720p on TV app. Also the HDR colour does not work for devices connected to the HDMI 1 port. Colours washed our (e.g. reds look orange) in Netlifx etc with HDR Colour enabled. Numerous reports of same thing for other Samsung TV's in many other forums so not just me!! Samsung TV's really are a load of junk and Samsung support are useless/ non existient. My next TV will be an LG or Sony I'm afraid.
UE55JU6400 here. 720p only. The other tv in the living room(ue55nu7023) works fine.
Is samsung trying to pull an apple on us and making the tv feel obsolete on purpose?