Rob Ager is a British independent filmmaker, writer, and internet film analyst renowned for his detailed psychological and thematic dissections of cinema, particularly in the horror and science fiction genres.

Based in Liverpool, England, where he was raised amid the socioeconomic challenges of the 1980s, Ager transitioned from a 17-year career in social care, supporting individuals with mental health issues, homelessness, and youth in care, to full-time creative work, leveraging his self-taught expertise in psychology and filmmaking.

He launched his website, Collative Learning, in 2007 as a platform for promoting independent filmmaking and psychological insights, which unexpectedly evolved into a global hub for video essays that have garnered 20-40 million views across his YouTube channels as of 2021. Ager's analyses emphasize symbolic and subconscious elements in films, drawing on his background in mental health to explore dark human themes, and he has been credited with originating influential interpretations, such as the theory of child sexual abuse subtext in Danny Torrance's storyline in Stanley Kubrick's The Shining (1980).

His work has gained recognition in mainstream media, including features in The New York Times, Time Entertainment, and The Irish Times, though it has also faced academic criticism, such as a 2011 review by University of Toronto scholar Dan Leberg accusing it of pseudo-intellectualism and unoriginality. It has been incorporated into academic contexts, such as undergraduate courses on Kubrick at Ohio State University and consultations for scholarly books like Diana Walsh Pasulka's American Cosmic. Notable video essays cover films like 2001: A Space Odyssey (1968) where he interprets the monolith as a metaphor for the cinema screen, The Thing (1982), Eyes Wide Shut (1999), and Alfred Hitchcock's Psycho (1960) and Frenzy (1972), often addressing broader issues like Cold War anxieties, criminal psychology, and conspiracy theories in Kubrick's oeuvre.

In addition to analysis, Ager has practical filmmaking experience, directing short films such as The Victim in his late 20s and his debut feature, the horror film Turn in Your Grave, in 2012, produced on a low budget amid financial hardships. He has authored digital books, including Lessons from Stanley Kubrick on the director's techniques, How to Make Great Films on Rock Bottom Budgets, and Collative Learning.

Operating independently through Patreon, digital sales, and commissions, Ager prioritizes substantive content over sensationalism, critiquing modern cinema trends like excessive CGI, politicization, and "Easter egg" overload in essays such as "26 Reasons Why Modern Movies Are So Awful." Despite lacking formal academic credentials, his self-education has positioned him as a pioneering figure in online film criticism since the early days of YouTube.