Video getting truncated

I am having a weird issue. When importing and playing a video in Dorico, the video ends about 20 seconds before the actual ending. I wonder if there is something wrong that I am doing?

Any help appreciated.

Is it possible that the flow isn’t long enough to accommodate the whole length of the video? If you add a bit more time to the flow, does the video keep playing?

Oh of course, Thank you Daniel.

I feel monumentally stupid (In fact I am!)

Sorry to waste a post.

Not at all. I’m glad there was a simple explanation!