Half of YouTube not working in Safari

[twentyred]

Since the 5.1.4 update on Lion. Anyone else noticed this? Approximately half of the videos on YouTube are refusing to play / showing just a black box with the playback buttons in the wrong place. Latest version of Flash, everything working fine in Chrome.

Any ideas what might have caused this?

( Example - this video for me is broken, hope this isn't against the rules http://www.youtube.com/watch?v=5UeLk6vmbtM )

 

[Schtumple]

That video works fine for me, do you have any extensions or plugins that might be conflicting?

 

[twentyred]

Only Adblock and 1Password, still happens with extensions disabled.. thanks though!

 

[dEsUrU]

youtube HTML5 trial auto-enrolled?

I suspect you have enrolled in the youtube html5 trial.

Just unsubscribe.

Here is the link.

http://www.youtube.com/html5

good luck.

 

[The-Pro]

Unsubscribing to the HTML5 wont make it work. Infact HTML5 work near flawlessly in safari for me, (on 6 machines) and the rest of flash on youtube is a total piss. Just doesn't work!! Occasionally after like 5 reloads and what not it works. But then it jumps frames and all kinds of stuff. Works perfectly in Chrome because it has its own flash player.

 

[James_C]

I had a similar problem as the OP on both my Mac Pro and MBP ( slightly different as on my machines it would start to play videos then stall / stutter), unsubscribing to the HTML5 trial as suggested by dEsUrU, sorted the problem out on both machines. This problem has been raised on other threads as well, and in a large number of cases opting out of the HTML5 trial fixed the issue.