Why it worked
The video leverages bizarre, high-engagement 'brainrot' visual humor to showcase the app's creative output, making the promotion feel like a native piece of entertainment.
Product placement
Cantina: (a) it ACTS — the video is a demonstration of a video generation/editing effect created using the app, and the caption explicitly credits the app for the creation. Removing it would change the video's purpose, which is to showcase the app's capabilities.