The feature you are referring to is the (Promotion Video) released to commemorate the launch of Chainsaw Man Volume 9 . This specific trailer, titled " 『チェンソーマン』9巻発売記念スペシャルweb CM ," was published on the Jump Comics Channel on YouTube on November 3, 2020.
The background music used in this PV is a track commonly known among fans as . Despite its popularity in the manga's promotional materials, this song is not part of the official anime soundtrack produced by MAPPA. Key Details of the Feature The feature you are referring to is the
A high-energy track often referred to as "Whistle Snake." While some fans associate it with various remixes or "Little Mix" edits online, the original source for the manga's hype was this specific Volume 9 PV . Despite its popularity in the manga's promotional materials,
The trailer features stylized motion graphics of manga panels from the series, highlighting major characters and action sequences from the Katana Man and Bomb Girl arcs leading up to Volume 9. The Jump Comics Channel (the official YouTube channel
The Jump Comics Channel (the official YouTube channel for Shueisha's manga magazines).
Chainsaw Man: Story Arcs List in Order, Chapters & Episodes - Yahoo
Celebration of Chainsaw Man Volume 9's release in Japan.