Hi, I am an experienced scriptwriter (Indian writer, GMT+3) for explainer videos. I regularly work with a few video production/ad agencies and am familiar with your requirement. I use a different format to write my script and the visual suggestions, though!
I'd be glad to help you with your launch/promo video by composing a compelling script for the animation.
I will try to submit the first draft in 24 hours and I charge $25/minute of animation with up to 3 revisions.
Hope to help you,
Regards,
Sharmila H.