It all depends on what version of CS6 you are using. If you are using the Creative Cloud branch that feature would have been added in with the 12.1 release I believe. If not, I do not believe the perpetual licenses ever received that update.
This is correct.
The perpetual license version of DWCS6 (one time payment disk/download) does not have these features. They are only available via a Creative Cloud Subscription in the Cloud version of DWCS6.
You can still use html5, but you will need to do it manually. One work around is to make an HTML5 folder in your Snippets window, then place blank html5 Snippets within it for future use.
I am reading that to acquire html5 one can download the the html5 pack?
There was an HTML5 pack for CS5. But it was only for basic HTML editing. The insert video feature you are looking for was not part of that original pack.
I think the HTML5 pack extension for CS5 vanished when CS6 released.
CS6 12.0 (perpetual license) did not receive any updates beyond 12/2012.
Insert HTML5 > Media option wasn't introduced until later in CS6 12.2.0 update which was only rolled out to Creative Cloud members.
To use HTML5 video, just copy & paste the following code into your HTML5 document. Save it to your custom Snippets folder.
<video poster="YOUR_POSTER_IMAGE.jpg" controls >
<source src="YOUR_VIDEO.mp4" type="video/mp4">
<p>Your browser doesn't support HTML5 video. Please upgrade to a modern browser.</p>
Thank you everyone for commenting on this - and especially Nancy for the Code for a custom Snippets folder.