Indicates the source is a Blu-ray Disc (BD) rather than a TV broadcast, typically offering higher quality and uncensored visuals. MP4: The video file container. ✅ Summary
It indicates that a previous version of this specific episode (released by the same group or others) had a technical flaw, and this version is the . 🔍 Why a release is labeled "PROPER" [Witanime.com] SMNB EP 12 END BD-HD.mp4
A "proper" release is issued when the initial upload contains one of the following issues: Indicates the source is a Blu-ray Disc (BD)
The sound doesn't match the characters' lip movements. [Witanime.com] SMNB EP 12 END BD-HD.mp4
Artifacting, dropped frames, or encoding errors.
The site or group that encoded/uploaded the file.