When you start your research, you might find nothing or you might not know where to start! That is normal. Here are some tips.
Reading a Wikipedia page or encyclopedia entry on your scientific topic to build foundational knowledge. This helps you become familiar with terms, concepts and context.
Brainstorm a list of search terms for each of your concepts. Think of synonyms, broader or narrower terms and related terms.
film, cinema, cinematography, video, movies, motion pictures, etc.
rising sea levels, coastal inundation, erosion, sinking islands, climate migration, etc.
Be prepared to search in several places, not just one database. Be persistent and use a variety of search term combinations.
If you don't find anything searching on the film name, Early Human Fetal Activity (1952) for example, you might need to break down the film into related concepts.
Example searches: (embryology AND film), (embryology AND cinematography), ("fetal development" AND documentaries)
Use the results to infer the issues related to the film and form ideas for how you talk about the film in context.