Novice question on audio/video cabling

I am about to purchase a new home theater system.  I want to hook my
audio signal from both my HDTV tuner and DVD player into my receiver
to get Dolby 5.1 sound.  Do I also need to route my video through the
receiver, or can I route the video directly to the TV monitor.  Is
there an advantage to sending the video signal through the receiver,
or not??

Not sure if this is the appropriate forum for this question; if not,
please advise a better group.

Many thanks.