Choose a photo, position the three triangle points, choose the hex zoom, then press Auto. The preview and MP4 can include a black credit panel on the right with a miniature source image, triangle outline, and photo credit.
Drag any numbered point while Auto is stopped.
Choose a photo to begin.
Export requirements: current Chrome or Edge, WebCodecs H.264 support, and enough disk space. MP4 data is written directly to the file you choose, so long exports no longer need to fit in browser memory. Keep this page open until the export finishes.