Nearly everybody searching for a testimonial video script wants the customer to say something specific and is worried they will not. The instinct is right and the fix is not a script: a customer reading your words is obvious in the first three seconds, and the FTC's guides are about an endorsement reflecting the endorser's own honest opinion. What works is a question sheet with an example answer beside each question, which is what most published script examples actually are.
What to send instead of a script
Three questions, one line of context each, and an example of the kind of answer you mean: 'e.g. we were quoting by hand and it took two days'. The example steers without putting words in anybody's mouth.
The shape of a good ninety seconds
Fifteen seconds on who they are and what they do, thirty on the problem, thirty on what changed, fifteen on who they would recommend it to. Tell the customer that shape; do not write the sentences. Told as a shape rather than a script, most people land within fifteen seconds of it on their second attempt.
Where a script is legitimate
Your own voiceover, the lower thirds and the closing card. Everything the customer says stays theirs, and everything around it is yours to write. Write the introduction, the on-screen name and role, and the closing line about what you do. The customer's ninety seconds in the middle stay entirely theirs, and that division is what keeps the film both usable and honest.
Questions people ask about testimonial video script
Can I tell them what to say if it is true?
No. Suggesting the claim and having them repeat it is not their honest opinion, whatever you believe about the underlying truth.
What about a bullet list of points to cover?
That is a question sheet with extra steps, and it is fine. The line is between prompting a topic and dictating a sentence.
They asked me to write it for them. Now what?
Write the questions again, more specifically, and offer a phone call where you ask them and they answer. Never send words for them to read.