I think the manual's HDMI description is correct. The laptop is the A/V Source and your camera would be the A/V receiver. However that is not what you want.
I know I can attach an HDMI cable from my laptop to my LCD TV and display the laptop A/V on the TV. However, that does not allow me to display the TV's output on my laptop.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT