This post describes how to troubleshoot issues relating to Youtube videos which wont play. Videos on YouTube are streamed through an Adobe Flash player. For the best viewing experience, we suggest to install the latest version of Adobe Flash after removing any old versions you’ve installed.
Warning: Uninstalling the software should be done on the descretion of the customer. Make sure to take permission from the customer before we continue further steps. Create system restore point to be on the safer side.
Uninstall Flash and follow Adobe’s instructions, listed here: http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_14157
Once uninstallation is complete, reboot the computer.
Re-install Flash Player by clicking on the following link:
http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash
Try to view video again on www.youtube.com
If the above steps did not help, please follow the steps below:
Disable or uninstall any pop-up blocking softwares installed on the PC.
Allow youtube.com as trusted site in Firewall software installed on the PC.
Ensure applications like Quicktime, iTunes, Real Player or Windows Media Player etc. aren’t set as default streaming application.
Windows Vista users:
If the flash uninstall/re-install does not work, this may be due to a Microsoft Windows Vista permissions issue.
Please use the Windows button at the bottom left-hand corner, then the search function:
Go to: C:\Windows\System32\Macromedia\Flash\
Right-click the following file: FlashUtil9b.exe or FlashUtil9e.exe
Select ‘Run as Administrator’ and install the update.
Restart your computer
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