EAS Crawl Text, Color, Speed, Manual Switching, and Background Image

EAS Technical Best Practices- Crawl Text, Color, Speed, Video Switching, and Background Image Improvements- Please consider the following questions: 1.) What specification would you suggest for the speed of the crawl text? 2.) What specification would you suggest for the positioning of the crawl text? 3.) What specification would you suggest for the color of the crawl text? 4.) What suggestions or best practices do you have for manual switching? 5.) What suggestions or best practices do you have for a background image?