You may face this issue Media suddenly won’t play on Win 8, if there are some conflicts with the third-party codecs software installed on the PC. It could also be possible that the PC is not able to handle a lots of processes which are running.
Have you installed any third-party codecs software on your PC?
Please confirm if you are facing this issue only when trying to play online videos?
Which web browser are you using?
Please uninstall any codecs software that you have installed recently. Uninstall, change or repair a program
You may also temporarily disable anti-virus program and check if you are facing this issue.
Important: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn’t disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you’re done. If you’re connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.
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