Why this tool is useful
Add a logo, draft badge or ownership mark to a private short clip with explicit size, position and opacity controls.
Local File Tools · runs locally
Private Video Image Watermark
Place one local PNG, JPEG or WebP image over a short browser-decodable video and export WebM without uploading either source.
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.
How it works
The browser decodes both files, scales the image within bounded canvas geometry, composites it on each frame and records a local WebM.
Practical example
Place a transparent PNG at 20% width in the bottom-right corner, keep the video's audio and verify the chosen geometry before download.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.