What do you mean by “trouble getting a signal to the DVD player”? As in the blu-ray output is not up to your expectations on the TV? That you can’t access Netflix at all? Or you can access Netflix but it doesn’t streaming smoothly?
Because based solely on your description, it doesn’t make sense why it would make any difference where the blu-ray player was plugged into your network wiring. As long as the lengths are not excessive (ethernet is good up to 100m), it’s irrelevant. Are you sure it’s not just a bad cable?