A:AnswerSplitting any signal weakens both outputs. If you add a signal booster you might get it to work or blow out the splitter. Look up how much signal strength the monitors your splitting too need. It gets even trickier if they have different signal strength requirements. If your splitter isn't powered then the signal demand might damage your player.
A:AnswerI own this model and it plays 3d and upscales to 4k. It also has smart functions like apps and Bluetooth. It also has a small footprint than 4k ultra players. It should meet your needs.
A:AnswerThe only discs that I've had the experience of using are DVDs and Blu-Rays but I do have my external hard drive that I can plug in so when family comes over we can watch all the family home movies I've recorded over the years. The external plugs into the port right in the front underneath the power button.