You assign a Skype Meeting Broadcast policy to an event team member by using the Grant-CsBroadcastMeetingPolicy cmdlet. However, there's no change in the broadcast meeting functionality for that user.
This functionality isn't yet enabled for Skype Meeting Broadcast even though the broadcast meeting policies and the cmdlets to assign these policies are available.
Currently, there's no workaround to modify the Skype Meeting Broadcast functionality for a specific user. However, you can use the Set-CsBroadcastMeetingConfiguration cmdlet to change the functionality for all users. For more information, see Set-CsBroadcastMeetingConfiguration.