Video compressor

תקציר מקורי באנגלית<p><strong>Tool:</strong> <a href="https://tools.simonwillison.net/video-compressor">Video compressor</a></p> <p>I recorded a short demo video of <a href="https://simonwillison.net/2026/Sep/7/equal-earth/">my Equal Earth</a> animation on my phone and wanted to publish an optimized version of that video (using FFMPEG) on my blog, so I had Claude Fable 5.1 in Claude Code for web <a href="https://claude.ai/code/session_01QHTdJZ4xg6TZfDXCmuvAE9">build me this tool</a> using the WebAssembly build of FFMPEG.</p> <p><img alt="Screenshot of a video compression web tool. Under "Versions to generate" is a table of five presets (Largest, Large, Medium, Small, Smallest) with output sizes of 854×370 or 640×276, CRF quality settings from 22 to 28, and audio bitrates from 128 to 64 kbps, plus options for