Firstly many thanks to Martin Fiedler.

I want to play two or more videos at the same time.
Which methot should be used ? Multiple form in an application (MDI style),
or multiple MPUI application in Windows?

Player PC will be remotely managed via socket programming.
During play time, I have to log start time stop time and any problem.

is there any restriction or any problem in MPlayer or MPUI?