Some Videos Not Supported by this Browser (ESPN)

  • Many videos refuse to play, instead I get the message "this video is either not available or not supported by this browser" This again just happened to a video on ESPN regarding last night's ball game.

    Is this a known issue or do I need to change some setting regarding videos? I am using the latest version.

  • links?

  • At, try any video shown within the box scores.

  • Moderator

    Must be a Mac-only problem as the videos it work on Windows and Linux.

  • Moderator

    Please, It would be easier for internals to look in bugtracker for such issue if could you tell us which hardware (Mac system, Graphics) and OS version you use!

    Can you try to open vivaldi://flags/#ignore-gpu-blacklist and set to

  • All Videos working well with manjaro.

  • @gwen-dragon

    That seems pretty obscure for an issue of being unable to play certain videos. Some I can play, but not all. If I am the only person to experience this, there should be some setting that was set wrong for my environment, which is the latest versions of Vivaldi and Sierra.
    How can one check this issue with the developers?

  • Moderator

    @bartinva said in Some Videos Not Supported by this Browser:

    How can one check this issue with the developers?

    If you found a bug, please report the issue to the developers to fix it.

    How to do a bugreport for Vivaldi
    Report each bug seperately at
    Describe the issue as precise as you can.
    Add some information about extensions you use.
    Add information about the operating system and version you use.
    If you have problems with video or audio give us information about your installed codecs and graphics card/GPU.
    Add a exact link to the page where the issue comes up and can be tested.
    After reporting the issue, you will receive a confirmation mail from the bugtracker.
    In a reply to this mail you can add more information and files (like screenshots or testcases) as attachments and it will be added automatically to bug report.
    If you have questions about the bug please ask in forum first and do not forget to post the VB-XXXXX bug number (you can find it in confirmation mail).

    Thanks in advance for helping us to make Vivaldi better!

  • Moderator

    @bartinva There has been a lot of activity in Vivaldi's Mac forums lately about video playback issues... Vivaldi relies on the macOS system libraries to play some types of video, and the current implementation of the internal video player requires that hardware acceleration be enabled. Please check your hardware acceleration status by going to vivaldi://gpu

    If hardware acceleration is not available on your system, your video driver was most likely blacklisted by the Chromium developers because it caused some problems with their code. Unfortunately, this also partially breaks video playback in Vivaldi. You can work around this (until a proper fix is released) by overriding the GPU blacklist in vivaldi://flags ; it's the first entry in the list. Enable the flag, restart Vivaldi, and this should enable video playback on most sites.

    Some iMac users have also reported video playback issues on some sites, even with hardware acceleration enabled. This is a bug in Vivaldi. Unfortunately, there is no workaround.

    Fixing video playback on macOS has been a work-in-progress for a while now. Hopefully we'll see a proper fix to address all of these major issues soon.

  • @gwen-dragon

    Thank you, Gwen.

  • @xyzzy

    All my hardware acceleration flags are green except for CheckerImaging.

    I tried enabling the first flag for overriding and saw no improvement. As before, I can see videos on YouTube but not at several other sites, for example at the ESPN score boards for baseball and hockey.

    I keep my iMac up to date, however, it is from August of 2010 and may have a dated video driver.

    Thanks very much for your suggestions,

  • Moderator

    @bartinva It's not your fault at all; it's an iMac-specific issue. Vivaldi needs to change the way that they decode H.264 (MPEG-4 AVC) video on older iMacs. YouTube videos play fine if they're encoded with the VP8 or VP9 codecs; playback for those formats is handled differently.

    This is a known issue and fixing this is one part of a bigger project to improve video playback on macOS.

  • Thanks again!

  • Following as I've run into this issue on a variety of sites. I've submitted bug reports when encountering the issue. Hopefully this gets fixed in an upcoming snapshot.

  • Hello,

    I'm having same issue... With MacOS latest snapshot...

  • Problems on a lot of sites with video. I use V as my default browser and I love it. But the poor video playback makes me have to use Safari over and over again. It is good to read Vivaldi is finally admitting there is something not working in de codecs on the Mac platform. Nice to hear they do work on Linux and Windows, but that doesn't really help us mac users. Is it a license issue we don't need to know. It just feels that there is a lot of "beating around the bush" to fix this. It seems that by know V should have a good idea of what is the cause. Fixing has now become "part of a greater project" ...

  • @xyzzy [sorry for my poor english, I speak spanish] I've tried every solution. The fact is: none of them work. It is very frustrating that the usual answers to these questions in Vivaldi are "enable or disable this or that flag". I want to use Vivaldi to enjoy the internet, not to become a programmer...
    I Have a Macbook pro 13'', 2011 late.

  • Another video URL: Unable to play live streaming video from but this plays in Safari and Chrome

  • Moderator

    @rsaeks said in Some Videos Not Supported by this Browser (ESPN):

    Unable to play live streaming video from but this plays in Safari and Chrome

    Bug reported as VB-33992 "Livestream can not be played -"


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