Why it worked
The video uses a relatable 'POV' hook that taps into common student anxiety, making the subsequent mention of the study tool feel like a natural, helpful solution rather than a forced advertisement.
Product placement
Gauth: (a) it ACTS — the creator explicitly mentions it as a tool for solving hard test questions, and the caption and creator's thanks confirm its utility for study. Removing the mention would remove the entire point of the video's resolution.