6bf131c7__x____About_Licenses___DocWiki__Description
[License] maxvideo [Description] 
The maxvideo license denotes the maximum number of video licenses that can be used for scheduled and reservationless meetings on this particular system. If the videoconf license count exceeds the value of the maxvideo license, the system uses the value of the maxvideo license instead. The value of the maxvideo license is the absolute system limit for video conferencing. Any maxvideo license limitations for your system appear in the Comment field on the Licenses Summary page. To find this page in the Administration Center, see the Displaying Licenses. Restriction: If you purchase and install a new maxvideo license, it overwrites the old one. The new port count is not added to the previous port count.
Cisco Unified MeetingPlace Express, Release 2.x -- About Licenses - DocWiki