How do I use HDMI w/ a receiver/TV/DVD player set up?

I use DVD player(s) to listen to CDs mostly, so I'm planning on getting a Yamaha home theater receiver, although I'm not "that into" movies, so I probably won't be hooking up 5+ speakers to it... anyway, it doesn't seem likely that just one HDMI cable would connect three units -... show more I use DVD player(s) to listen to CDs mostly, so I'm planning on getting a Yamaha home theater receiver, although I'm not "that into" movies, so I probably won't be hooking up 5+ speakers to it...
anyway, it doesn't seem likely that just one HDMI cable would connect three units - rec'er, TV and DVD player - so I need to know if I am wrong or if I'm right and if so, what else do I need and how do I use it? Thanx~Jonathan
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