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YouTube Tests 8K Video Streams – Demands 50Mbps UK Broadband Speed

Tuesday, June 16th, 2015 (2:49 pm) - Score 18,402

Internet giant Google has announced that their massively popular online video streaming service, YouTube, can now stream content using the very latest 8K Full Ultra HD video standard (7680 x 4320 pixels). But at twice the resolution in both directions ofย 4K it also requires double the broadband speed (i.e. around 50 Megabits per second).

At this stage support for 8K is arguably more about bragging rights because virtually nobody owns an 8K supporting display or TV at home and that’s unlikely to change for a few more years, heck even 4K (3840 x 2160 pixels) displays are still suffering from fairly low uptake and the amount of content available at that resolution is also extremely limited. Not that you could even perceive the visual difference between 4K and 8K without a truly massive TV.

Never the less Google has decided that now is the time to start adding 8K support and so they’ve uploaded a few videos, such as the ‘Ghost Town‘ demo below. But even if you can run it (not everybody will see the option) then there’s not much point unless you’ve got an equally huge screen to truly do it justice, not to mention a decent broadband connection.

Speaking of broadband speed, video streaming is always a variable experience depending upon the codec used and also because the amount of data being sent will vary from frame to frame (e.g. frames that consist entirely of a single colour, be they 480p or 8K, would still run fine on slow connections as there’s not much to show).

But of course most video content is significantly more complicated than a single colour and our tests of the 8K stream found bitrates that generally hovered between 20Mbps and 50Mbps (Megabits per second). The peak speed is usually best for reflecting the required performance needed to deliver smooth playback (our figure of 50Mbps is obviously anecdotal).

Putting that into perspective, Ofcom’s last broadband speeds report (here) found that the national average fixed line download speed was 22.8Mbps and the Government are also working to make speeds of greater than 24Mbps available to 95% of the United Kingdom by 2017.

Customers of Virgin Media’s 50-152Mbps capable cable network and those already able to get faster than 50Mbps through BT’s FTTC network, not to mention the lucky minority that can benefit from pure fibre optic (FTTH/P) connectivity, are already prepared for 8K. But there’s a long way to go for everybody else; not that it matters, yet.

Leave a Comment
9 Responses
  1. Avatar DTMark says:

    Is YouTube rate adaptive? I didn’t think that it was. But if I open that in a new window and run it full screen, and watch ‘Performance’ in Task Manager I see it instantly ramp up to 27 Mbps, stick there, drop down, then hover between 0 and 30 Mbps in a cyclical pattern as the video plays. Doesn’t go much higher than that, but it doesn’t stutter either.

    Just an ordinary monitor here, but it does look stunning.

    If only the music industry could be persuaded to do the same and support high resolution music. We’re not all part-deaf and listening to music on mobiles via headphones ๐Ÿ˜‰

  2. Avatar Pedrostech says:

    My i7 3770k and AMD 7750 seems to be struggling, since I’m only getting about 15fps.

    I agree DTMark, modern compressed music does sound pretty…lacking.

  3. Avatar Tom says:

    Can’t say that I see a difference above 1080p on my Samsung monitors.. Might be a different case if I had it on a new TV, high res mac or something.
    My i7-4790k can’t do smooth playback either ๐Ÿ™

  4. Avatar Glenn says:

    Youtube demands 50Mbps to watch a cat fall over in ultra HD..?

  5. Avatar Tim says:

    Does any one have and 8K screen big enough to actually see the detail?

    1. Avatar Steve Jones says:

      LG have a prototype 8K TV which is 98″ across the diagonal, but I rather doubt anybody has one of those in their living room.


      The highest resolution computer monitor on the UK market I know of is only about 5K.

  6. Avatar Zenuser27 says:

    So Youtube.. Check!
    over 50mbps.. Check!
    Getting a machine that can play it….. :/
    My new Mac and my PC with a 3GB Radeon is struggling. Yet I can play latest games in full res!

  7. Avatar Bob2002 says:

    I never thought much of HD, but was quite impressed by 4K – I did actually have a 40″ 4K monitor for a while. The 8K stutters on my FX-8350/GTX 960 combo but once Windows natively supports the GTX 960’s H.265 hardware acceleration(which laughs in the face of 4K) I should be good to go.

  8. Avatar M says:

    It played fine on this overclocked 980 GTX and 6-Core Haswell-E, however, the 8K video will only play on Chrome and not Firefox, which bugs out and/or does not display at all. CPU usage is 20% and GPU usage is 40%. So yes, I guess you are going to need quite a beefy system, as well as an actual display to view this properly which I do not thus downsizing was needed which may affect the usages result. ๐Ÿ˜‰

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