To use your device as a portable display for Camera, Gaming Console, Laptop, PC or others with HDMI output, you need an HDMI to USB C dongle (aka UVC capture device or Video Capture Card, not USB C hub nor USB C to HDMI cable).
To use your device as a portable display for Camera, Gaming Console, Laptop, PC or others with HDMI output, you need an HDMI to USB C dongle (aka UVC capture device or Video Capture Card, not USB C hub nor USB C to HDMI cable).