This video, titled "Rurouni Kenshin Final Chapter: The Final / The Beginning - Special Report" (映画『るろうに剣心 最終章　The Final／The Beginning』特報), was released by "Warner Bros. Official Channel" (ワーナー ブラザース 公式チャンネル).
Rurouni Kenshin, introduced in the video is a work by Nobuhiro Watsuki, which was serialized in Shueisha's Weekly Shonen Jump from 1994 to 1999.
It's often abbreviated as "Ruroken" in Japanese.
The manga about Japan in the early Meiji period has sold more than 72 million copies.

"Rurouni Kenshin: The Final/The Beginning" will be released during Golden Week in 2021 and is the final part of the "Rurouni Kenshin" film series which has earned a total 12.5 billion yen at the box office.

The cast includes Takeru Satoh, Emi Takei, Mackenyu, Yū Aoi, and Yōsuke Eguchi.