This bookmarklet adds a download link for videos in Sakai so you can quickly download the files for playback in an external video player. Finding iframes by title isn't ideal, but it works for both places Announcements appear in Sakai. Also, the space after the title for each iframe is required.

add-download-links-to-sakai-videos.js

var iframeObjects=$('iframe[title="Recent Announcements "], iframe[title="Announcements "]').contents().find('object');iframeObjects.each(function(){var flashVarsArray=$(this).find('param[name="FlashVars"]').val().split('=');var url=flashVarsArray[1];var url=url.split('&')[0];$(this).after('<div><a href="'+url+'">Link to Download Video</a></div>');});