Attached video is very slow

This is a new one for me; I have an attached video which contains audio that I am writing to. Suddenly, the tempo of the video is very slow…I have detached and reattached and no changes, so there must be a setting in Dorico I am missing?
I Try to Think About Elvis.dorico (3.8 MB)

Are the sample rates the same for Dorico and your attached video?
Is the video frame rate the same as Dorico expects (based on when you attached it)?

I did a hard reboot of the system and now all is well…