A method of adjusting video compression parameters in a public safety communications system, for encoding source video based on a computer aided dispatch assignment disposition of a viewer, the method comprising: performing, by a CAD policy enforcement device of the public safety communications system, wherein the CAD policy enforcement device is separate from a source of a video stream and a remote video receiving device: receiving, from the video receiving device, a video stream identifier indicating a video stream and the source of the video stream, wherein the video receiving device is remote from the source of the video stream; receiving an indication of a CAD assignment disposition of a viewer of the video stream who is using the video receiving device, wherein the viewer is a field officer of the public safety communications system and the CAD assignment disposition indicates an assignment of the field officer to a CAD incident; determining a set of video compression parameters from a previous set of video compression parameters, based on the indication of the CAD assignment disposition of the viewer; sending (120; 208) the set of video compression parameters to the identified source of the video stream to enable encoding of the video stream to a different compression level corresponding to the set of video compression parameters; and causing the source of the video stream to transmit the video stream to the remote video receiving device at the different compression level performing, by a CAD policy enforcement device of the public safety communications system, wherein the CAD policy enforcement device is separate from a source of a video stream and a remote video receiving device: receiving, from the video receiving device, a video stream identifier indicating a video stream and the source of the video stream, wherein the video receiving device is remote from the source of the video stream; receiving an indication of a CAD assignment disposition of a viewer of the video stream who is using the video receiving device, wherein the viewer is a field officer of the public safety communications system and the CAD assignment disposition indicates an assignment of the field officer to a CAD incident; determining a set of video compression parameters from a previous set of video compression parameters, based on the indication of the CAD assignment disposition of the viewer; sending (120; 208) the set of video compression parameters to the identified source of the video stream to enable encoding of the video stream to a different compression level corresponding to the set of video compression parameters; and causing the source of the video stream to transmit the video stream to the remote video receiving device at the different compression level receiving, from the video receiving device, a video stream identifier indicating a video stream and the source of the video stream, wherein the video receiving device is remote from the source of the video stream; receiving an indication of a CAD assignment disposition of a viewer of the video stream who is using the video receiving device, wherein the viewer is a field officer of the public safety communications system and the CAD assignment disposition indicates an assignment of the field officer to a CAD incident; determining a set of video compression parameters from a previous set of video compression parameters, based on the indication of the CAD assignment disposition of the viewer; sending (120; 208) the set of video compression parameters to the identified source of the video stream to enable encoding of the video stream to a different compression level corresponding to the set of video compression parameters; and causing the source of the video stream to transmit the video stream to the remote video receiving device at the different compression level