OpenShot/openshot-qt — reverse-engineered prompt

Build me a free open source desktop video editor like OpenShot for Linux, Mac, and Windows.

I want a normal person to be able to drag in videos, audio, and images, arrange them on a timeline with unlimited layers, trim and cut clips, snap things into place, resize, rotate, and scale clips, and preview transitions while editing. It should support titles, subtitles, image overlays, watermarks, simple 2D animations, 3D animated titles if possible, scrolling credits, keyframe style animation, slow motion, fast motion, reverse playback, and frame by frame accuracy.

Please include audio mixing and basic video effects like brightness, hue, gamma, greyscale, and chroma key. It should import and export common formats using FFmpeg or similar tools, and render finished videos in common codecs. Make the interface feel friendly and visual, with drag and drop and timeline zooming and panning.

Use Python with a Qt style desktop interface if that fits. Look up current docs online if needed.