Use Protection: HDMI Lock For Canon 5D
Video monitor manufacturers SmallHD have recently released a port cover for the Canon 5DmII that prevents the HDMI port from getting damaged due to an accidental, uncontrolled removable of a mini-HDMI cable. This video makes you hold your breath as they drop a camera from the HDMI cord, but the Port Protector seems to hold strong. A very handy add-on to save you from a potential costly repair. Always practice safe shooting!