6bf131c7__x____About_Licenses___DocWiki__Description
[License] videoconf [Description] 
The videoconf license limits the number of concurrent video participants for premium (scheduled) meetings. The available number of video ports may be further limited by the maxvideo license. If you do not install the videoconf license, the system can use only the six trial video ports for premium (scheduled) meetings. (A port is defined as a single video caller connecting at any rate.) Requirement: To enable the system to use the videoconf license for premium (scheduled) meetings, you must install the systemsoftware license.
Cisco Unified MeetingPlace Express, Release 2.x -- About Licenses - DocWiki