We've noticed that the moodle standard role "teacher" (non editing) and the moodle role "student" have the same ltiRole = "learner".
We've identified this together with Kaltura Support by sending a traffic analysis to Kaltura Technicians (Kaltura is our Video Mgmt Storage Solution).
Our goal is, we want different ltiRoles for the moodle standard role "teacher" (non editing) and the moodle standard role "student" so we can give them in Kaltura different permissions.
In this Kaltura documation you see in the table the Moodle roles
Student = Learner
Teacher = Instructor
we need the nonediting teacher as a separate ltiRole
https://knowledge.kaltura.com/help/kaltura-video-package-for-moodle-setup-guide