Issue with TOC overlaying MP4 embedded video in Firefox (Captivate 7 HTML5 output)

Only in Firefox, I am coming across an issue when I have a video embedded on a slide, the overlaying Table of Contents displays but is not clickable. This is both when the video is paused and playing. The TOC comes over the embedded video area on the slide. I have considered it is possibly a z-index issue with Firefox, but really need a workaround.
Firefox 28.0, Captivate 7 HTML5 package, MP4 video

Hello Kris,
Please check your output in other browsers like Internet Explorer and Google chrome as well.
HTML5 output from Captivate is tested and supported only on below browsers
Internet Explorer 9 or later
Safari 5.1 or later
Google Chrome 17 or later
http://helpx.adobe.com/captivate/using/publish-projects-html5-files.html
Thanks

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