Response on a video | English homework help

Please use information from the film and/or readings to address the following question: How was slavery institutionalized in this country (i.e. what laws allowed for chattel slavery and dehumanization of Africans?).   What was the rationale for slavery racism (against Africans) or economics? 

Please response to the video for a page

The link to the video is:

https://www.youtube.com/watch?v=ak1SlHjFBbU