I need help in finding a YouTube Video that talks about Quantitative and Qualitative Research in a Community.

1. What factors in your Video suggest in-depth research (a "deep dive") was required to understand the community's characteristics?
2. Why were both quantitative and qualitative research needed to get to the bottom of the issues facing the community?
3. How can marketing research determine if health issues are symptoms rather than the root of the environmental conditions of the community?