Important note: When replying and reporting about this particular issue in this thread or elsewhere. Make sure to include which year the TV-model is from. From the information I have gathered this particular issue with the YouTube app not playing in 4K and defaulting to 360p. is only with the 2018 and older Samsung models - but not 2019 and 2020 Samsung TVs.
Changed my connection from wifi to Wired and I can confirm that I still have issues with anything above 1080p, very low network activity and short buffer health, this happens on version 20201208_00_RC04 On a Samsung UN65NU7400 Firmware 1310.4 from 2018.
Thank you for confirming that the internet through cable will not solve this problem. I had a strong feeling it would not help.
It is not okay that we buy extra equipment, upgrade our internet, etc. and use a lot of time, efforts and money that even still will not solve this - we should not even have these extra costs in the first place ! This is another reason why Samsung needs to acknowledge the problem is not external but in the TV (or the TV's One Connect Box) !
I have exactly opposite experience. Wired one fixed the issue and I believe it's a bug in the WiFi driver.
The issue can be reproduced every time.
Stats for nerds shows virtually no activity on wireless and 4k. The LAN connection gets up to 1min buffer instead. Wireless is less than 50cm (2feet) away from the rooter and fast.com ends up with around 88Mbit/s.
I checked with my and my friends TV's and I can confirm below models have same issue.
- 2018 Samsung Q7FN (65 inch)
- 2018 Samsung Q8FN (65 inch)
- 2018 Samsung NU8000 (55 and 65 inch)
If you enable "stats for nerds", I have noticed that UHD videos that break up show Codecs:
vp9.2 (562) / mp4a.40.2 (149) or
vp9.2 (561) / mp4a.40.2 (149)
But free UHD samples that work perfectly fine show Codecs:
vp9.2 (337) / opus (251)
My thought is that 561 and 562 are newer formats that Google have started streaming and the older Samsung TV's do not support it (yet?) - I've read that the latest Samsung TV's work fine.
But I wish Samsung would just acknowledge the problem and say whether they are working on a solution or not.
It would also be good if Google could acknowledge if they have recently altered their Codecs and this might affect streaming to certain hardware.
What is the point of manufacturers having bulletin boards if they don't respond to them?!
Samsung UE65LS03NASXXN same problem here for more then a month now. Samsung rly needs to get their act together. I dont understand why they dony roll the update back for the time being. They seem to not care about it and put it on youtube