YouTube using Silverlight


WOW. This little sliver of news from MIX09 this week slipped by me. YouTube are streaming March Madness live using Silverlight. If you don’t know what March Madness is, don’t worry (strangely I knew…) but that’s not the news. The news is this isn’t being delivered in Flash. The quality is stunning.

Start of things to come on YouTube? I hope so….

Hat tip to GigaOm and NewTeeVee

Comments (15)

  1. Elan Hasson says:

    I’m happy to see YouTube adopting this technology. Maybe this will replace the flash player they currently use now that they have a built-in HD button!

  2. Jeremy Bierly says:

    While this is pretty cool.  It’s CBS Sports that should get the credit for Silverlight.  The youtube site’s just referencing the CBS Stream.

  3. Romeoiv says:

    WWWWWWWWOOOOOOOOOOOOOOOOOOOOOOWWWW, I WANT TO SCREAM. I will live to see Silverlight dominate on the web, its not that I dont like Flash (Flash is beautifull in many ways) but  it is to teach the Flash developers a lesson most of them would love to see micosoft go bankrupt (Thats what they blog about) in stead welcome a second technology so they have a choice.

    Let the race begin.

  4. _||_ says:

    What’s hilarious is that Silverlight works with IE, Safari & Firefox only. Now, Youtube is pushing Chrome (as is every other Google site), but imagine the frustration of the Chrome user who goes to Youtube but finds himself locked out due to lack of Silverlight-iness. (granted most Chrome users have another browser as well).

    I also wish Microsoft supported Opera (especially on the Wii, I know, I know a competing gaming platform, but still) on PC at least with Silverlight.

  5. Tom says:

    Microsoft’s idea of cross platform is "works on all versions of windows".  Silverlight is tied to .net, which isn’t supported on Linux or os x.  I doubt it’ll be real competition to flash in the forseeable future.

  6. Tom says:

    Microsoft’s idea of cross platform is "works on all versions of windows".  Silverlight is tied to .net, which isn’t supported on Linux or os x.  I doubt it’ll be real competition to flash in the forseeable future.

  7. Paul Walker says:

    Silverlight is tied to .net?

    Then why is there a mac version?

  8. scommisso says:

    It’s too bad they’re using platform detection to lock it out, and then saying only Windows/IE in their description. A lot of Silverlight apps work just fine in Chrome and Opera, they’re just not "officially supported", which probably means they are slightly buggy in certain cases. I have a photo/video sharing site running SL2 that works just fine in Chrome and Opera.

  9. Snympi says:


    Not sure you’ve been following how the Silverlight player works.  Installs a mini version of the .net CLR as a browser plug-in (on Safari too so it does run on X), and now outside of the browser too, although still sandboxed (also on X).  Have a look at ScottGu’s keynote at mix.

    Also, although not perfectly stable, Silverlight works in my version of Chrome.

    With the work that everyone is putting into online video YouTube might to do well to support at least both players – especially now that SL is H.264 capable as well.


  10. Ärrimurri says:

    I wouldn’t want to see anyone using silverlight (and no, I’m not a flash developer) anywhere.

    If a site requires silverlight, they can do without me for I’m never installing that stuff on my computer 🙂

  11. Zephiris says:

    Looking closely at several of the streams, this doesn’t appear to be substantially different from Youtube’s "high quality" (MP4) flash videos.

    On a decently large browser window, at least, there’s a lot of blocking and aliasing and motion artifact. Basically none of this was present with the Olympics HD silverlight streams.

    This also has nothing on the standard Youtube HD videos. I don’t know why anyone’s remarking about the quality. Youtube using Silverlight (or rather referencing CBS’s use of silverlight) is perhaps noteworthy, but it’s not good compared to their own Flash-based streams.

    It’s rather atrocious when you’re not looking at a small cleaned up thumbnail.

  12. Joseph says:

    Silverlight is dead. Programmers know html/js and designers know Flash, Silverlight has no market.

    Of all companies, MS should know that technical merits have nothing to do with adoption, as was demonstrated with mp3 vs wma.  People don’t care about HD web video, crappy Flash video is good enough. Besides, video will soon be native to html and both Flash and Silverlight will be rendered irrelevant as far as video is concerned.

  13. John Dowdell says:

    <em>"YouTube are streaming March Madness live using Silverlight."</em>

    Hi Steve, if you’ll check, you’ll see it’s actually

    (a)  CBS NCAA streaming video via WMP

    (b)  YouTube helping NCAA discovery via IFRAME.

    (btw, I came here while trying to find this week’s word on Silverlight for Windows Mobile. Know of any links? tx.)


  14. stevecla01 says:


    agreed it’s CBS streaming via Silverlight though the fact it comes up under a YouTube domain is still of interest I think.

    wrt to Silverlight for WinMo I don’t have any info on that I’m afraid


  15. WDA says:

    @jd/adobe (John): The HQ (High Quality) player is Silverlight. That’s what everyone is referring to. You are right though. It’s just an IFRAME. Not a true embed. Still though…your average Joe ain’t gonna care.

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