@Terry is working on VIM3 to support the dual independent display feature over TS050 and HDMI, he already complete most of the work but there still have a few bugs to be resolved until we finally release the image.
Is VIM3 dual independent display feature not yet released?
In the VIM3_Pie_V200103 version, The TS050 touch screen display the same as HDMI.
Do you have other settings or android application that supports dual display?
2，Download and Installation DualVideoScreen.apk
3，Copy an MP4 video to /sdcard/ directory, named 123. mp4
4，Open the DualVideoScreen application and display the video on the secondary screen. The main screen can operate other applications normally
5，Click on DualVideoScreen again to turn off the dual-screen display