A:Answer You can't run two extra screens with a single 2-output splitter. With a 2-output splitter, you run your original input signal into it, and then one of the outputs goes to your original screen, and the 2nd output goes to one extra screen.
I don't know if anyone makes a 3- or 4-output splitter.
You could buy two 2-output splitters, and daisy-chain them together to get two extra screens. In other words, one of the outputs from #1 splitter goes to the input of the #2 splitter. I have done this and it works but not with the Best Buy 2-output splitters.