YouTube Fullscreen lag in Safari

Question

YouTube Fullscreen lag in Safari

Hello I have over the last couple of weeks encounter an error when I play a YouTube video on full screen in Safari. I have tried to reset every setting, removed a lot of Cache files, used CCleaner to remove, stuff but still I have the problem.

It is only on Safari it happens not on Google Chrome, Firefox, or any other browser, and if I am not in full mode it doesn't lagg on the videos. only full mode,

So please if anyone of you know a solution I would be grateful.

Sincerely, Patrick P.D.

MacBook Pro with Retina display, OS X Mavericks (10.9.4)

Posted on Jul 21, 2014 5:44 PM

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Answer 1

Top-ranking reply

Carolyn Samit

Level 10

165,673 points

Jul 21, 2014 6:23 PM in response to Djbasshazzard

Open System Preferences > Flash Player then select the Advanced tab.

Click Delete All under Browsing Data and Settings

Not empty the Safari cache.

From your Safari menu bar click Safari > Preferences then select the Advanced tab.

Select: Show Develop menu in menu bar

Now click Develop from the menu bar. From the drop down menu click Empty Caches.

Now try a video.

If nothing above helped, troubleshoot Safari extensions.

From the Safari menu bar click Safari > Preferences then select the Extensions tab. Turn that OFF, quit and relaunch Safari to test.

If that helped, turn one extension on then quit and relaunch Safari to test until you find the incompatible extension then click uninstall.

Patrick ... third party Mac cleaning utilities are not necessary on a Mac, more like overkill and cause far more than good. Visit the CCleaner website for uninstall instructions.

Your Mac runs maintenance in the background for your > Mac OS X: About background maintenance tasks

Also, Flash is integrated in other browsers, but not Safari which is why you're not seeing the lag on Chrome or Firefox. Safari uses a standalone Flash plugin.

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Answer 2

Jul 22, 2014 12:58 AM in response to Carolyn Samit

I have done everything You have said and still lags out.

Ah alright, but I just remember something extra, when I have secondary Monitor on, And not using my MacBooks Pro Retina display it doesn't lag there, Its mostly only on the MBP display.

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Answer 3

Aug 29, 2014 2:52 AM in response to Djbasshazzard

I think I have the same problem as you. When I watch youtube videos fullscreen they play normally but then they stop and the "spinner" comes up and it doesn't buffer. I have to refresh the page and it continues for another minute or two and the same again, extremely annoying.

It has happened for a long time and I actually switched to Chrome to avoid the problem but recently switched back to Safari for the better interplay between my Mac and iOS devices.

I initially was using an extension that forced HTML5 video for youtube because this worked without the problem of buffering, but the quality wasn't as good as flash because HTML5 youtube is limited to 720p (in Safari, but not Chrome...). I tried the flash player again today and the problem with buffering still persists.

It almost seems as though when you go fullscreen the youtube player doesn't think you are using it so it doesn't bother buffering anymore...? Hard to explain. This is the first similar sounding report to my problem I've found, although I'm not 100% sure you have the same problem.

Charlie -

PS: looks like Safari 8 in Yosemite will support 1080p youtube in HTML5... so I guess I can just wait for that. But I'm not sure about this...

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