There are two methods by which the download button can be revealed for downloading a Kaltura video:
1. The media owner may enable the download button on the media page in the KMS and KAF applications.
Find more details here: https://knowledge.kaltura.com/help/download-media-entry
2. The administrator may enable the download button on the player setting via the KMC application.
Find more details here: https://knowledge.kaltura.com/universal-studio-information-guide#download