From: charlie@xxx.net   
      
   On Sun, 6 Aug 2017 19:09:23 +0100, "Mr Pounder Esquire"   
    wrote as underneath :   
      
   >Using Firefox 52.01 es2 or something. It's the latest ediition.   
   >XP SP3.   
   >   
   >   
   >Youtube videos don't work, but work okay using SeaMonkey.   
   >I'm on Virgin Media, 75 down. When I moaned the engineer came round and   
   >fitted the Superhub 3, checked and corrected the downstream levels which   
   >were high and said that all was   
   >okay.   
   >Youtube still hung up. He said that he did not know why and left.   
   >I've asked in the Mozilla group, but nobody replied.   
   >   
   >Error message is:   
   >"Your browser does not currently recognize any of the video formats   
   >available. Click here to visit FAQ about HTML5 video"   
   >Either that or "Your browser does not support HTML5 videos"   
   >I can watch videos from the BBC etc, but not youtube.   
   >   
   >I deleted Firefox Profiles, the problem was still there.   
   >I deleted Firefox using Revo Uninstaller, downloaded and installed Firefox.   
   >It made no difference to youtube.   
   >   
   >I've used Malwarebytes, AVG, Superantispyware, CCleaner, defraged etc.   
   >Am I missing something?   
   >   
   Dont know if this is the answer but I had the same problem a week or so   
   ago.  After trying everything else I Re-intalled the latest ESR version   
   from the proper setup file, then Classic Theme Restorer and Flash BUT I   
   have not reinstalled any Ad blocking or script blocking.   
   YouTube works fine now so this maybe the answer, let us know if it works   
   for you too! The ads are a pain of course... C+   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)