Is it possible to have one remote with 2 tablets with 2 DJI pilot apps installed on each tablet and let me be able to split the signal from a single remote into both tablets with a the Y splitter which they make so we can have dual screens and dual functions for each of the tablets. An example use tablet a to have a constant video and tablet b to make changes on the inspire on the fly without having to go back and forth on one  apps

No. This is a digital signal, not analog. What you're looking for cannot be done.

You can have an HDMI Monitor and mobile-device running at the same time, though...

HDMI would be live video correct