Genshin Character check before 7.0

This video likely worked because it tapped into a popular trend format ('character check' or 'duet trend') within the Genshin Impact community, leveraging the game's large and engaged player base. The visual appeal of the characters and the rapid succession of different character pairs kept viewers engaged.

The video showcases various characters from the game Genshin Impact, presented in a trend format where two of each character appear. The creator is checking their Genshin characters before version 7.0.