I have a Sony XBR65X810C 65" 4K Ultra HD TV. I noticed there are 4 HDMI inputs: HDMI 1 HDMI 2/MHL HDMI 3 HDMI 4/ARC What is the difference between them? Can any of my components (DVD Reorder, DVD/Bluray Player, DirecTV DVR, Shaw Direct Satellite Reveiver) that have HDMI outputs be plugged...