The system will disable the video output signal when it detects non-HDCP compliant display(s) playing the HDCP video source. All the connected output displays must be HDCP compliant while the video source is HDCP compliant.
We suggest user do not use the low-resolution monitor to watch the higher quality video source. The screen resolution can only be backward compatible, not forward compatible. So please adjust the video source resolution appropriate for the output screen resolution.
Please refer the steps below:
We suggest user to use the same screen resolution to set video wall so that user can get the best performance.
It is recommended to use HDMI splitter with two or more ports.
The IHD-410PR might not copy the correct EDID. Please refer the following:

By default, the Video Mode is selected.
Graphic Mode: It’s usually for the static state video. Pictures are the main display contents, and the pixel update processing is not so fast. The CPU consumption is lower than video mode.
Video Mode: It’s usually for the dynamic state video. Videos are the main display contents, and the pixel update processing is fast. The CPU consumption is higher than graphic mode.