KingYoloMan
One software cannot control more than one device.
You can try to run the same software twice. Unzip the 5 inch software into 2 different folders and in one of the folders also rename the executable for a different name and see if works.
Run one first, connect to a device, then run the other and see if will connect to the other device (as the first one will already be tied to the first software)
If doesn't work, then no idea, you might need to be able only to run a video on the second device via the device area of the software.