Embodiments herein provide mechanisms for a receiving device to indicate to a transmitting device viewport information to indicate a region of interest for point cloud video content. For example, the receiving device may transmit a real-time transport control protocol (RTCP) feedback message that includes the viewport information. The viewport information includes an indication of a reference point for the region of interest. The receiving device may receive, from the transmitting device, the point cloud video for the region of interest based on the viewport information. Other embodiments may be described and claimed.