Video Watermark Studio

Video Watermark Studio is a native GTK 4 application for adding text or
image watermarks to videos.

Features:
- Text watermarks with font, colour, opacity, outline or shadow
- Logo and image watermarks with adjustable size and opacity
- Nine placement presets with adjustable margins
- Live WYSIWYG frame preview at any point in the video
- Export to MP4 or MKV with H.264/AAC and three quality presets
- Cancellable exports, progress reporting and "Show in folder"
- Drag and drop, keyboard shortcuts and a clean GNOME-style interface

Video Watermark Studio never overwrites your originals.