Question: In Mission Critical Video (MCVideo) according to standards, how is the video media flow for a private call between users from different organisations routed?
Option 1: Directly between the users' devices without involving any MCVideo system.
Option 2: Through the primary MCVideo system of each user, with potential local duplication under its control.
Option 3: Only through a central, shared MCVideo system designated for inter-organisational communications.
Option 4: The routing depends on the type of video codec used by the users.
Explanation: According to media routing requirements for MCVideo, when users in a private call do not belong to the same organisation, the video media flow is routed through the primary MCVideo system of each user. This ensures each organisation's MCVideo system handles the call, crucial for mission-critical communications requiring high reliability and security.