To create a Sales Page video, the best script to follow is the outline of your sales page itself.
But as you ideally want to keep it under 5 minutes, you want to make it a bit more concise and snappy.
So using the worksheet where you wrote all the copy for your Sales Page, cut it down and re-write if needed to a conversational version.
You can follow the structure really closely, but I like to keep the key elements but put my own speaking style on it.
Below is an example of a loose translated version of my Sales Page in a 3 minute video.