I found this on GitHub, dated 4 years ago: https://github.com/tan-tan-kanarek/kaltura-ad-server
As long as it is published on GitHub, I take it is a foss.
Is there anyone who knows more about it, the project lacks any documentation. I managed to install it and start it, but there seems to be an API against a Kaltura server. However, I don’t know how to discover the API endpoints.
Any insight will be much appreciated.