what qualifies as a primary source depends on the context and field of study
e.g. primary source for World War II is a historical document, while a documentary about it is a Secondary Source because it’s the director’s interpretations and not really what happened
a movie is NOT a credible source for the study of history
NOT more inherently reliable than secondary sources
primary sources can be affected by emotion, memory loss, fear of speaking out, etc.
e.g. someone in Nazi Germany wouldn’t write “I don’t like Hitler” even if they do
Secondary Sources
interpretation and commentary of original source material