Well I saw youtube videos even yesterday. But now I see this message...
your browser does not currently recognize any of the video formats available
Can anyone tell me how can I fix this in Ubuntu 14.04?
Well I saw youtube videos even yesterday. But now I see this message...
your browser does not currently recognize any of the video formats available
Can anyone tell me how can I fix this in Ubuntu 14.04?
You should install a package called "ubuntu-restricted-extras" with this command in a terminal:
Actually, installer offers to do it for you but you may have not checked it up. This package brings various parts that may be illegal in some countries, so they are kept out of installation images. This contains archievers, encryption software and media codecs.
as @Barafu said, you haven't given much information as to your setup.
i would suggest using the Google Chrome browser, and trying to enable HTML5 video playback in YouTube (rather than using Flash video)
try checking https://www.youtube.com/html5 to see if it is enabled in your current browser
Clear the browse cache
The usual solution to all your problems.
In Chromium "settings > advanced > cookies and other site data"
Did you run the software updater? It may have updated and caused some compatibility issues. Try to use the canonical browser. just search "browser" and there should be another browser. If that doesn't work, than look at updating flash player.