Show HN: Preview video timelines live in the browser as AI agents edit them

Tellers released agent skills that let AI coding agents build OTIO video timelines from local files or URLs with cuts, layers, titles, effects and music, preview them on localhost and export MP4 to the project folder. The tellers-otio-player skill needs Python 3 and a browser with no Tellers account, while tellers-mcp requires an account and adds cloud project editing, footage and transcript search, generated voice, music, images and video, and live preview. Install is via npx skills add tellers-ai/skills or the Claude Code and Codex plugin marketplaces, and the player is published at https://tellers.ai/videoplayer/bundle.js under the MIT license.