Since some of you have asked, here it goes.

To hide the embed/email options when self-hosted videos finish playback, simply edit the file /plugin/content/jw_allvideos/includes/sources.php (in Joomla! 1.5) or /plugin/content/jw_allvideos/jw_allvideos/includes/sources.php (in Joomla! 2.5+) and change all instances of 'oncomplete': 'true' to 'oncomplete': 'false' (they should be at lines 32 and 58).

We'll also remove it from the 4.1 update.