Script writer for youtube videos (Latest Science news related)

I am looking for a professional script writer to create longer scripts for youtube videos related to the latest science news. The script should be well researched and include dialogue and visual elements, and should be provided in a .docx (Word Document) format. I will provide topic for script. The script must be higly engaging and story like, also writer must take information from reliable sources. Please provide examples of your previous work when applying. I may also ask to provide short demo for a given topic before assiging work.