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solved this myself. below my solution.  If that doesn't work for you call support: ask them to reset/ensure permissions allowed.  (When that didn't work for me -- I looked closer at my source. Hah!

 

 

I compared the (working) "public" video html to mine.

 

I found I was elementizing  "< src=..."  src is an attrib of <video>, not a sub-element (is that even a thing?).

My fault for trusting the example I started working with -- it had src as a (sub) element (and wasn't even closing the <video  element:

http://www.onextrapixel.com/2012/02/29/top-10-ways-to-embed-video-into-a-web-page/

 

look at option 4 for HTML5.  hah, hah hahhahahaha!

so the correct html5 is:

<BODY>

<video width="720" height="405" controls poster="images/Start.jpg"

src="vids/mine.mp4" type="video/mp4" >

Your browser doesn't support HTML5

</video>

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