Publish the video to the course Media Gallery
Go to the Media Gallery, search for the video you would like to make downloadable.
Select the video by clicking on it .
Below the video you will see a button titled ACTIONS.
Click on the drop down arrow next to it and select Edit.
Click on the downloads tab located directly below the video
Select all the flavours available
Select save.
Your Kaltura video is now downloadable for studen