I have a new home with the receiver etc in the closet and the TV on the wall. There is a very thick HDMI cable run between the two (approx 50 ft) and 2 Cat5e Ethernet cables. I am not able to get 4k through the HDMI cable, which is understandable given it's length. My understanding is that I may be able to get it using the Cat5 cable and some of the various converters. Are there any that work well?