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YouTube doesn't work in Safari on mid-2013 MacBook Air 13".

I've tried enabling HTML5 video at, and some videos did start playing after that, but most videos still don't work.

What I've noticed is that if you're viewing a video that does in fact work, and go into the full-screen mode, then all subsequent videos (which are suggested after the original video ends) do work, but only whilst you're still within the full-screen mode -- as soon as you exit the full-screen mode, depending on the video, Adobe Flash might again be required right away, without any option of going back fullscreen.

How do I make YouTube work without Adobe Flash? Clearly YouTube videos should all work without any exceptions, since they all are already encoded in H.264 just fine.

share|improve this question
Not all YouTube videos are enabled for HTML playback yet. – StephenCollins Jul 15 '13 at 17:33
@drummin, what do you mean? why not? is there any workaround, as obviously the full-screen html5 mode works for every single video, apparently. – cnst Jul 15 '13 at 18:29
Can you give an example of a video that will not play for you in html5? – AllInOne Jul 25 '13 at 1:39
@AllInOne, most of them don't work, actually; it's more difficult to find a video that would actually work; just one of the many examples of videos that don't work: , and if you search for "Daft Punk Get Lucky", then most of the videos in the results (remixes etc) won't play in HTML5. – cnst Jul 25 '13 at 1:45

So this isn't a total solution but it should help.

You reported that even though you joined the html5 program the following video did not play in html5:

I was able to reproduce that result in Chrome.

Here's how I was able to get the video to play in html5:

In Chrome:

View > Developer > Developer Tools > Click on the little gear icon

In the resulting preference window:

Settings > Overrides > User Agent [X] > iPad -- iOS5

Then reload the video and it will be in HTML5.

Similar solution exists in Safari, but I have to walk the dogs. Back soon.

share|improve this answer
LOL, I guess one should run YouTube through a proxy with masquerading User-Agent! How nice of Google to make its own browser able to view videos on YouTube if one claims it's not Chrome, but Safari on iOS! :-) – cnst Jul 25 '13 at 2:02

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