Why it worked
The video uses a relatable hook about growing up and then subverts expectations by embracing immaturity, which is often a shared sentiment among the target audience. The inclusion of a discount code for a specific product at the end provides a clear call to action.
Product placement
ANXIRING: ACTS - it is a brand of rings that the creator is promoting with a discount code. Removing it would change the video's promotional aspect.
Squishy toys: APPEARS - they are the subject of the video, but no specific brand is mentioned or acted upon. Removing them would change the video's topic, but not its promotional aspect.