Tellcut turns a screenshot or a sentence into a motion video: app launches, product walkthroughs, game ads, sale ads. Claude Opus 5.5 writes every frame as code, so your real UI, text and colours stay sharp instead of being redrawn by a video model. Then you edit by chat: pick a shot on the timeline, say "make the title bigger", and only that part changes. Every change is a new version you can compare or undo. 16:9, 9:16 or 1:1, up to 30s, 1080p MP4.