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This browser does not support video playback

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CAP55
CAP55
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I have the latest version of firefox / flash and I've been getting this for a while now on sites like twitter. The video play button disappears as soon as it's displayed while scrolling down the page and a "This browser does not support video playback" is displayed.

I've looked around here but can't find a solution. I'm on XP SP3 (I love this OS and refuse to downgrade) so I guess that could be an issue, however I CAN view twitter videos using Chrome just fine, so this issue seems specific only to Firefox on XP.

I tried starting FF in safe mode and the error still shows up. I also read that twitter uses MP4 videos so I tried setting different programs like VLC & MPC in FF's application settings but still nothing.

Any help would be really appreciated! Thanks.

I have the latest version of firefox / flash and I've been getting this for a while now on sites like twitter. The video play button disappears as soon as it's displayed while scrolling down the page and a "This browser does not support video playback" is displayed. I've looked around here but can't find a solution. I'm on XP SP3 (I love this OS and refuse to downgrade) so I guess that could be an issue, however I CAN view twitter videos using Chrome just fine, so this issue seems specific only to Firefox on XP. I tried starting FF in safe mode and the error still shows up. I also read that twitter uses MP4 videos so I tried setting different programs like VLC & MPC in FF's application settings but still nothing. Any help would be really appreciated! Thanks.
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cor-el
cor-el
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This message is not about Flash, but about the HTML5 media player. Since you are on Windows XP you may be out-of-luck with playing MP4 files via the HTML5 media player because there is no native support in the Windows OS for playing such an MP4 file.

Google Chrome comes with built-in support to play such media files, but Firefox relies on built-in OS support because of licensing reasons.