Why it worked
The video leverages popular Japanese song lyrics and anime-style visuals to attract viewers interested in Japanese culture and language learning, subtly promoting the Kakitori app as a tool to achieve fluency.
Summary
The video displays lyrics from a Japanese song, presented in Japanese, romaji, and English. It also shows the name "Kakitori" and its website "kakitori.com/app" at the bottom, suggesting it's an app for learning Japanese.