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It plays on my iMac 5K with just a tad bit of buffering. Now I'm really sucked into those videos though, so beautiful.

https://keepvid.pro/download?video=https://www.youtube.com/watch?v=1La4QzGeaaQ#download-hint

click other format, select webm 4320p. Then you'll need a player that decodes webm files. Not sure which ones use GPU decoding for the mac. The video should appear on screen, select the 3 dots next to the full screen button. Click Download from there
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Beauty of poor optimisation and weak GPU's. Apple needs to decide if the MBP is about sales and marketing for the masses or a high end professional product. My primary W10 notebook copes without issue, YT at 8K is the very least of my concerns, however stability, performance and reliability is...

Q-6

rMBP 2013-15" : it chokes
Thinkpad t580: it chokes on the iGPU (hd620) but when I force Chrome to use the nvidia MX150, on the same laptop, it's all good.

specs: i5-8350,32gb,4kscreen
 
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What is the true resolution playing in stats for nerds window?
yt.jpg


I have X1C too, I'm a little flabbergasted, Task Manager was showing maybe 80% on video decode on UHD620, playback was buttery smooth, except at the beginning lost some frames, while my RTX2080Ti, in desktop, was showing similar utilization while playing this. Trying to play this with either RX580 o Vega FE connected as eGPU through TB3 was a disaster.
 
I played this video again on my gaming rig running i7 4770k, 32gb, rtx 2080 ti, 1gbp/750mbp internet connection - buttery smooth. Video decoding was loaded at 80% of the gpu throughout the entire playback.
 
Doesn't work on chrome on my Windows 10 desktop system. Works fine on Firefox at 8K. Uses about 10% of my i9900K CPU. I have a RTX 2070 card handling video chores so that probably helps the CPU a lot. 350 MB/sec network.
 
Apart few hiccups in the beginning (probably due to internet) it played smoothly both in Chrome and Brave browsers on base iMac Pro.
 
Nobody has mentioned this, but I have read articles that have stated to stream 8k requires at least 50 Mbps and could even require 80-100 Mbps. I assume some playing this here at 8k don't have sustained bandwidth that fast - that would certainly explain the buffering delays.

Also - How do I play this video in 4320p60? When I click the settings gear, the best it shows is 1080p60 on my 2019 MacBook Pro.

You gotta use Chrome for anything above 1080p buddy :( Which sucks I know
 
"You gotta use Chrome for anything above 1080p buddy"

No, you don't.
There are numerous browsers (other than Safari OR Chrome), which will play 4k content just fine, thank you very much.

I would NOT recommend Chrome to ANY Mac user.
 
My 2019 2.3ghz i9 with 560X on a wired gigabit connection plays it back smoothly but buffers every few seconds (if that makes any sense?). Seems like connecting-related buffering. I get this white circle. It's not maxing out the CPU. Google Chrome helper stays at around 1,050% usage (max would be 1,600).

On a semi-related note Intel says that its 9th gen CPUs have VP9 hardware acceleration. Youtube uses VP9, but clearly it is not hardware-accelerated on my machine with a 9th gen CPU. Same deal with Wifi 6. Intel says the 9th gen mobile CPUs have it built it, but my mac doesn't have it. :l ???
 
I would NOT recommend Chrome to ANY Mac user.

I wouldn't generally either, except in a corporate environment Safari has a habit of screwing up with NTLM/AD authenticated internal sites so bad it locks my account out (instantly, within 2-3 seconds, without prompting me to enter credentials due to any issue) - whereas Chrome (or Firefox, or Opera) does not.
 
Plays without any stuttering on my base level 2017 iMac Pro at 8k in Chrome

Stutters like crazy on my 2019 MacBook Air. In fact even after downloading the file it stutters when I try to play it through VLC or IINA.
 
The video stutters like mad on a i5-9600K 5K iMac in macOS but plays absolutely perfectly smoothly on Windows 10. The terrible performance in macOS on highly capable modern hardware is likely due to the lack of support for GPU hardware acceleration for VP9 video playback (VP9 is the codec used in high resolution youtube videos).

VP9 is an open royalty free standard backed by none other than Apple's nemesis, Google.

In macOS this leads to the use of much less efficient software decoding on the CPU. This is why everyone's macs are lagging like absolute crap on that 8K youtube clip (unless you have a 5K iMac with a i9-9900K or an iMac Pro Xeon CPU) in macOS but Windows 10 plays it fine. Internet speed obviously also plays a role, but this explains why it lags even after downloaded completely to the local SSD on the mac
 
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Just tried to play this youtube video in 4320p60 (external monitor), no stutters, went smooth. MBP 2019 / i9 / 560X
 
My MacBook Pro (see sig) played it absolutely smoothly without a single stutter or indication of an issue.

Joe
 
The 2019 i9 Macbook Pros must also have enough raw CPU performance with their 8 cores to play the 8K video smoothly without hardware acceleration. It is strange that the original poster and a few others had trouble with their 2019 i9's though. For those that are able to play it smoothly on their i9 MacBook Pros what % CPU utilization are you seeing in macOS?
 
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I have a 2018 i7 15" MBP Radeon....it stutters for me but it can be due to internet. Only have 175mb/sec. However for the moments when it isn't buffering, it's gorgeous.

Thanks to those stating Safari doesn't display this resolution...I had to use Chrome and couldn't figure that out.
 
2019 MBP 15 2.4i9 32GB 4TB Vega 20 plays a downloaded copy of Peru 8K from internal SSD at 20-40% CPU Utilization, 0% Vega 20, 70-75F, smoothly using IINA. That is, no GPU use only CPU used for IINA decoding and playback.
 
Apple does not support Google's VP9 codec, political reasons I suppose. My 2018 i9 model is unable decode that video on the CPU in real time, neither online nor offline.
 
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