Thanks again.
I belive I have found a possible solution. Running a Windows 10 Pro N - upgraded from a Win 7 Pro N. Similar HTML5 issues are resolved after installing the Media Feature Pack. I will try this and see how it goes.
Another symptom is that MP4 playback is scrambled after the upgrade.
ttp://stackoverflow.com/questions/21124885/html5-video-not-working-in-ie-11
Talk about barking up the wrong tree :/
Upgrade to Win 10 Pro N broke the HTML 5 playback. I only noticed that HTML 5 was broken after having upgraded to CP 9 and consequently thought CP 9 was the culprit. Ironically, I had two machines to test with, both Win 10 Pro N :/..
For anyone experience the same issue. There are two downloads of Media Feature Pack. KB3010081 and KB3099229. The first DID not work for me which to a while to figure out.
Thanks for everyone who contributed 