In order for DASH to work you need Media Source Extensions support. Firefox for example doesn't support them yet.
They're hidden behind an about:config flag - media.mediasource.enabled
The latest version of developer edition/aurora just enabled them by default, so version 36. They may be only ~12 weeks away from becoming default in the stable build.
Thanks, I didn't know that setting already made it into the stable build. Now I can watch Youtube in high resolution (and in VP9 with that!) without using Flash. Why is it still disabled though, there are some bugs left?
UPDATE: some remaining issues are listed here: https://bugzilla.mozilla.org/show_bug.cgi?id=778617
Re:HTML5 Video and the End of Plugins
by rustyconover on Sunday December 07, 2014 @12:15AM
(#8711320)
Not in safari or iOS
Re:HTML5 Video and the End of Plugins
by JohnTHaller on Sunday December 07, 2014 @12:53AM
(#8711389)
According to Steam it works in the Steam Client, Google Chrome, and Safari: https://support.steampowered.com/kb_article.php?ref=6730-TOA...
If they just say 'Safari', it probably doesn't work on iOS at the moment. But it should work on your Mac unless an extension/addon is interfering.
Re:HTML5 Video and the End of Plugins
by lern_too_spel on Sunday December 07, 2014 @12:53AM
(#8711388)
Safari on Mac now supports MSE, on which there are multiple DASH implementations. Safari on iOS is behind, but it's not hard to guess where it's going.
uses DASH and is works with pure HTML5 (no flash needed)