Why it worked
The video leverages the high aesthetic appeal and 'kawaii' factor of Sanrio characters, which has a dedicated and highly engaged fan base, combined with the popular 'what's in my bag' content format.
Summary
A video showcasing various Cinnamoroll-themed items being pulled out of a matching sling bag. The items include a water bottle, coin purse, photo cards, stickers, a stationery set, and a notebook.