2.39:1, as noted in the Violent Night Technical Specs on IMDb .

10-bit SDR (Standard Dynamic Range). Note that while many 4K releases are HDR, this specific version is tagged as SDR.

In the context of scene releases, a "PROPER" usually indicates a fix for a previous release that had technical issues. However, if you are looking for technical specs to ensure you have the right version, here is what that specific file signature entails: Technical Specifications 2160p (4K UHD)

The "proper piece" for a release with the filename usually refers to a NFO file or a specific subtitle file that matches the exact timing of that high-definition WEB-DL rip.

Approximately 1 hour and 52 minutes, according to Amazon . Where to find associated "pieces"

WEB-DL (lossless rip from a streaming service like Amazon or Apple TV)

x265 (HEVC), which is standard for 4K content to maintain high quality at smaller file sizes.

For a WEB-DL, you should look for "non-HI" (non-hearing impaired) or "SDH" English subtitles specifically synced for WEB-DL releases.