Videos no longer play

After updating to Leap 15.3, some videos stopped working.  For example I can no longer play videos from CNN in Firefox, Seamonkey or Chromium, though I can in Edge.  On the other hand, Youtube videos are fine.  I have looked in Software Management for both codecs and mime for any clues, but nothing.  Packman repository is enabled.  This is with KDE. Any ideas? tnx jk