Answer: Secondary data analysis
Explanation: Secondary data analysis is the analyzation technique in which the primary source of information and facts is gathered by some other person for other purpose than the researcher's purpose. That data is used by the researchers who practically has limited resources access for information and time.
The example mentioned in the question describes about the secondary data analysis because Alexis is using the information and sources (e.g -documentaries, articles etc )created by some other person for research.