The video likely performed well due to the engaging and interactive nature of the smile-analyzing filter, combined with the curiosity-invoking "Chinese Smile" classification and the use of multiple national flags which can appeal to a diverse audience.
Summary
The creator uses a filter that analyzes their smile and labels it as a "Chinese Smile." The video shows various flags and displays text describing the smile as refined, subtle, and charming.
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Transcript, structure and on-screen text
3 beats, a 29-word transcript and 6 lines of on-screen text — the parts you need to write your own version.