There is no reliable way to directly link to a Kaltura video in bCourses. This limitation is due to a variety of privacy and copyright concerns combined with how Kaltura works internally. Direct links may be possible in the future as these limitations are addressed.
If you need to provide a link that will allow members of your bCourses site to get to a page on which they can play an individual Kaltura video, please see How do I share media in Kaltura within bCourses? (It includes ways to provide a link that will get your viewers directly to the media.)