User ACLs for not registered users in opencast are listed in the event/series access policy view as non-user ACLs

[snoesberger]

If an event or series has user ACLs assigned for users who are not yet registered in Opencast, the user ACL is listed with the non-user roles instead of the user roles:

Use case:
In our case, ILIAS creates most of the series. ILIAS can assign ACLs to users who are not yet registered in Opencast. Once the Opencast user account is created, the user can log in and access his series and videos directly.