BytePlus Seedance 2.0 text-to-video. Describe a short scene and receive an MP4 clip with natural motion, camera work, and audio. The control panel offers an aspect-ratio selector with 7 options: 16:9 (landscape, YouTube), 9:16 (portrait, IG Reels / TikTok), 1:1 (square, IG posts), 4:3, 3:4, 21:9 (ultrawide cinematic), and 9:21 — pick by target platform. Upload a first-frame image to set the opening shot; the AI extends motion from there. Upload a last-frame image to set the ending shot; the AI wraps the clip on that image. Upload multiple keyframe images to chain scenes in order — the video traverses them sequentially, ideal for story-driven shorts with multiple scene changes. Strong at Chinese cultural scenes and Asian character animations. Use it for social-media content, product demos, educational shorts, or concept videos. Usage: 1. Prompt only, no file uploads. 2. Prompt + first-frame image. 3. Prompt + first-frame and last-frame images. 4. Prompt + keyframe images (label filenames: first-frame, keyframe-1, keyframe-2, ..., keyframe-n, last-frame). Do not upload first-frame, last-frame, and keyframe images at the same time. Use Simplified Chinese prompts for better results.