Why this tool is useful
Separate an introduction, scene or review segment while keeping both resulting parts and their timing manifest together.

Split a short browser-decodable video at an exact timestamp and download both WebM clips in one ZIP without uploading it.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
Separate an introduction, scene or review segment while keeping both resulting parts and their timing manifest together.
The browser validates the split point, records the ranges before and after it as real WebM clips, then packages both files and a manifest in ZIP.
Split a five-second clip at 1.75 seconds, verify both reported ranges and download the two-part archive.
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.