The installation and user's guide is available via the link at the bottom of the page. Content that can be included in video files is described on page 7 in the guide. On top of that, based on the instructions to launch
unplugged recordings using Ubuntu described on page 41, it would appear that the generated jar file is not a Java applet. Instead, the instructions suggest that it's meant to be downloaded into the user's desk/laptop, and executed from there (for Windows, double-clicking on it after downloading should work if Java has already been installed in the machine.)
In short, it seems that Blackboard Publish does not provide anything to embed and stream videos into a web page as you would with YouTube. It allows the generation of video files, or a standalone executable jar to be downloaded. This is probably why Blackboard said they can't help you with this...