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 into any of these HDMI inputs on the TV? Do I need any special typf of HDMI cable for the HDMI 2/MHL and HDMI 4/ARC inputs? What brand/type of HDMI cable has worked the best for you? Is there a length of HDMI cable I should try not to go over, so there won't be any signal loss? Thank you in advance for your assistance. Have a great day!