Hi Greg, thanks for the response. Actually, think of my house as a big circle, with the ends not connected. For better or worse (worse, I think!) the washer is physically 15' from the hot water heater, but at the end of hot water run. Thus, the answer to your question is: The furthest location is 15' from the water heater!
So, given that the distance is so short to return to the heater, does this warrant installing the return line instead of installing one (as above in the video) which returns water to the cold water line?