Browse YouTube with Google Chrome in Mac results in transparent video window

Question

Google Chrome can't play YouTube video since few days before.

• Google Chrome version: 12.0.742.100
• Flash player version: 10.3.181.26
• Mac OSX version: 10.6.7
• Extension installed: Tempermonkey , XML Tree

Symptoms:

• When YouTube video is played, audio only
• video area is transparent, revealing the contents behind Chrome
• when right click on the video area, the contents behind Chrome are clicked
• When Firefox 5 views YouTube , Flash Player crashes
• When Safari 5 views YouTube , it hangs (needs Force Quit)
• Since it happens, VLC cannot play video anymore (sound only)
• QuickTime works fine
• Issue only happens in YouTube site
• also happens in Incognito mode

I wonder if YouTube uses HTML5 player for Chrome or not.

Answer 1

I have:

• The same version of Chrome
• The same version of Flash
• Mac OSX 10.6.8

I do not see Tempermonkey available in Google Extensions, but I install XML Tree and was not able to repro the problem.

I do see something called Tampermonkey, and that could definitely be causing your problem. I would try uninstalling it and re-starting Chrome to check. If so, you have probably installed a script that has mucked up youtube. Go through your installed scripts and remove them until you find your problem.

Edit: It could be a quicktime problem if you are seeing a problem with HTML5 videos also.