I know you're going to say copy is copy, whether it's written or spoken, and I agree.
But, as I see it, while scripts are still copy, there is many more variables to cause problems. Voice, personality, appeal, confidence, execution, presentation, etc, are all far more exposed in video than written copy.
So, do copywriters advise the product owner on how to present the copy via video?
How are all these variables addressed to increase conversions (if at all)?
Surely with video there's the chance that good copy could be ruined by some of the many other variables which are brought into play through video.