Your installed plugins should be listed in the Tools -> Add-ons ->Plugins list. See:

• http://kb.mozillazine.org/Issues_related_to_plugins#Managing_installed_plugins

To check for updates to all detected plugins, visit http://www.mozilla.com/en-US/plugincheck/

If Java is not detected (the Plugin Check page will display a "Missing Java? ..." message) see:

• Use the Java plugin to view interactive content on websites
• http://kb.mozillazine.org/Java#On_Windows

If the Flash plugin is not detected, see:

• Flash Plugin - Keep it up to date and troubleshoot problems
• http://kb.mozillazine.org/Flash

Go to your Profile Folder (Profiles - Where Firefox stores your bookmarks, passwords and other user data will show you how to get there) and delete pluginreg.dat.

Then, open firefox and make sure you plugins are enabled.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do not click the Reset button on the Safe mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Thank you !! I figured it out!

Silly dinasour me! I had disabled all my plugins when I thought I had enabled them.

Thank you !! I figured it out!

Silly dinasour me! I had disabled all my plugins when I thought I had enabled them.

Thank you all for your responses and suggetstions as you can see by all three of my replies I figured it out and can now view all the videos

I wasn't able to view  before!

Thanks for posting back that you figured it out yourself, that you had disabled all your plugins by mistake. I'm glad that the solution was as simple as clicking the "Enable" button for all your disabled plugins in the Add-ons Manager!