Storyline video out of sync

I have nine small videos embedded in Storyline. When I first added them they were fine, but now they play out of sync. Audio a little behind video.

I am playing back on my desktop so a slow network isn't the problem.

I already deleted and replaced the videos but I still having the problem.

Any Ideas? I haven't experienced this before in Storyline when I embed video. Even with large movie files.

These are mov files. Each file is between 1 to 3 megs. Should I try something else?

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