Systems with more recent versions of FF fail to play while those people with older versions have no problem. But, I have staff that are reporting similar problems when trying to access training videos on other sites. And I realise that FF is ‘not for the enterprise’ to quote one of their official spokesmen and is regularly updated to block ‘dangerous plugins’ to prevent the children running FF from injuring themselves. I realise that Flash is post-consumer agricultural waste for the most part and that it is riddled with security flaws. Curiously, in many cases linking to a YT video though an outside website allows videos to play when directly accessing the same video from the YT site displays the symptoms reported above. This is not much of an annoyance for me since watching YT is not very high on my list of things to do. Then, and only then, the original problem videos would play when revisited. I went into YouTube and switched to HTML5. And regardless of how many times one clicks on said button no video will show or sound will emit, what then? Update, all that is displayed is a video window with the Flash logo/Button in the middle. If one has already done all that and, following the most recent FF

Centos firefox flash plugin out of date