You can go through the receiver if it has a video in along with a monitor out. If not than take the video directly to the projector from the DVD. If you have component video (red,gree,blue)on both the projector and the DVD that would be preferable over the composite video (yellow).
How to connect video input from projector
I want to set up a projector so that I can use the video inputs of the projector and the audio of my receiver. Does the video input jack get plugged from the projector to the receiver or the projector to the DVD player? Thanks guys