I have updated to the lastest version of Kaltura and I have customized the configuration file to include links to stream a single live stream from the RTSP source as described. I must assume the syntax is fine as I get no errors when I start NGINX. The VODs play fine via Kaltura but I am not able to get playback of the configured Live Stream. Even after customizing the port so their is no conflict.
My searches on the web show that a few people have claim to have gotten NGINX to ingest the RTSP live feed but not really clear on how but the issue that most of them report is the same. Basically, the process dies when you configure multiple streams. Either processing memory issue. I am not sure as the notes were very vage.
Unless you know the proper Syntax to use to have the NIGNX ingest the individual live stream them be allowed to play the stream back via the Kaltura Player as shown in my sample then currently this version does not allow use of live streams in RTSP format.