How to Write a 30 Second Commercial Video Script: In my last video I talked about the value of Digital TV advertising. Check it out! In that video, I mentioned the importance of a good solid 30 second commercial. So in this video, I’m going to give you 8 tips on how to write a good 30 second video script. 1 - Keep the script under 500 characters. That’s about 80 words on average. Google search “character counter” to paste your script into some free tools. Or, if writing in Google Docs, go to Too