All video outputs for the PTZOptics 12X-USB, 12X-SDI, 20X-SDI and 20X-USB are all simultaneous EXCEPT for the composite video output. Since a dial is used to set the resolution, the camera cannot be set to output 1080 AND 480 at the same time.
This means you can stream H.264 content over your network at the same time you output a 1080p 30fps HD-SDI signal.
This helps the PTZ Optics camera line provide the most flexibility for video conferencing and broadcasting scenarios.
See the picture below for an example.
This picture shows the PTZ Optics 20X streaming 3 ways.