*Some* Adobe Flash videos fail in Firefox, but okay in Google Chrome

Adobe Flash

Version 24.0.0.186

My system:

Toshiba Laptop Windows 10 Version 1607 -- all updates current

Windows 64-bit , English , Firefox Version 50.1.0

No Video

http://www.mediaite.com/tv/cnn-guest-cant-contain-his-laughter-at-katrina-piersons-trump-defense/

Hover mouse cursor over the blank area if video box doesn't appear.

Notice if you left click on the play button nothing happens.

Same with first video on this web page.

http://www.mediaite.com/online/dolly-parton-tells-cnns-baldwin-that-trump-and-clinton-are-both-nuts/

But this all works with Google Chrome.

Any ideas?