I think it would be a good idea to block Youtube's related video's when a video finished playing. Related or similar videos by keyword are not always appropriate for a site like the Oracle community.
According to some information on the web, adding "?rel=0" at the end of the URL should stop related videos from appearing. Unfortunately it cannot be tested because the Jive editor removes the string and adding it to the HTML code produces an error. Something may need to be changed in the appropriate Jive module.
Something similar to following might work:
<iframe width="960" height="500" frameborder="0" allowfullscreen="true" src="http://www.youtube.com/embed/3jy3oszJFX4?rel=0&autoplay=0&loop=0&wmode=opaque" marginwidth="0" marginheight="0"></iframe>