Video connections
The HDMI pass through does just that, provides a 2x1 HDMI switch with out HDMI audio processing. The only benefit to this is that when you change the input on the receiver it will change the audio and video source.
Otherwise save a few bucks and connect HDMI video directly to the display, you will only need 2 cables, vs. 3.
Check out monoprice or bluejeanscable if you need more AV cables.