The search term “World War Z BRRip 720p Dual Audio Work” describes a of the film, sourced from a Blu-ray, at medium resolution, with two languages (e.g., English + Hindi), and the user is specifically looking for a functional file without sync or corruption issues.
Variable Frame Rate (VFR) vs. Constant Frame Rate (CFR). Cheap encoders use VFR. Fix: Use MKVToolNix to remux the file. Set the video frame rate to 23.976 fps constant. Or simply use VLC Media Player → Tools → Track Synchronization → Adjust by -0.200 seconds.