Question: What is a requirement for MCVideo users who are affiliated to MCVideo groups, in addition to the general affiliation process?
Option 1: They can only initiate one-to-one MCVideo calls outside of their affiliated group.
Option 2: They must use a specific, unique User Equipment (UE) for each affiliated MCVideo group.
Option 3: They receive notifications for MCVideo group call setup and invitations for their affiliated MCVideo group(s).
Option 4: They are restricted from transmitting media in existing MCVideo group calls.
Explanation: This option is correct because, according to the specifications for MCVideo group affiliation, one of the key requirements is that MCVideo users who are part of an affiliated group must receive notifications for group call setups and invitations specific to their group, ensuring timely awareness and participation in group communications, crucial for mission-critical video services.