Media Plate Start Time doesn't work

I have a 720p MP4 video that I am using for my train windows to emulate train movement without animating an exterior environment. However, I would like to delay the start time for each window so it looks like the environment in the videos are passing by. The videos play normally without any delayed start time. But once I input a number above 0, it turns black and never plays.

Output Log prints: LogMediaPlate: Warning: Could not play anything.