YouTube embedding disabled? No YouTubes work for me - HELP?

[Allhallowsday]

I cannot embed YouTube links and cannot view embedded YouTubes (I can watch YouTubes at the YouTube website). 

I use Firefox to browse.  After losing power for 10 days, I have not since been able to do these typical pedestrian functions. 

Anyone have any idea why this has stopped working for me? 

[Jack]

Go here and check that your plugins are up to date https://www.mozilla.org/en-US/plugincheck/

[Allhallowsday]

Go here and check that your plugins are up to date https://www.mozilla.org/en-US/plugincheck/

Thanks...
Uhm is "shockwave flash" the means by which I can run embedded YouTubes? 

[Jack]

I think so.  I turned it off once and videos didn't work at all, so it must have something to do with it. 

[Allhallowsday]

I clicked on the link and "downloaded" a file, shut my computer off and restarted it.  It did not work. 

Anybody know what I need to do to get embedded YouTubes to work???

[Ed, Ego and Superego]

I have lost it on and off myself.  But nothing brings it back.