@mary_speight , @Nancy_Webb_CCSF , and @whewson ...
I can confirm this as well. I did some testing in my own sandbox course, and here is what I noticed:

The top Studio video was embedded without the media tabs interface, and then I embedded the same video with the media tabs below it. You'll see that the video on top is slightly less wide than the one on the bottom. In fact, when I take a look at the HTML, the width of the top video is 720 pixels, and the width of the bottom video is 800 pixels. So, I tried to embed the video again (without the media tabs), and then I manually changed the 720 pixel width to 800 pixels ... hoping that the Closed Captions icon would show up (thinking that the width was somehow hiding that icon). Unfortunately, after manually changing the width to 800 pixels, I still did not see the Closed Caption icon in the interface.
@AkosFarago ... Would you be able to fill us in on why the Closed Caption icon has seemingly disappeared when embedding videos that don't use the media tabs? I wasn't able to find anything in any of the recent Studio Release Notes or any Canvas Release/Deploy Notes.
Thanks everyone...
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