Likely an abbreviation for "One Piece" used by specific release groups.
The episode features the significant moment where King’s mask is broken, revealing his identity as a Lunarian. OS E107_720p.mp4
"The Fierce Fight Runs Wild! Zoro vs. King" (or similar depending on translation). Arc: Wano Country Arc. Likely an abbreviation for "One Piece" used by
Episode 107. (Note: In the full series count, Zoro vs. King occurs around episode 1062 . If your file is labeled 107, it likely follows a "Wano Arc" specific numbering system). 720p: Resolution (1280x720 pixels). mp4: The digital container format. OS E107_720p.mp4