Upload static/viewer4d.html with huggingface_hub

Upload viewer4d_export.py with huggingface_hub

Upload app.py with huggingface_hub

Fix .webm/portrait video input: imageio-ffmpeg fallback in extract_frames when cv2 headless FFmpeg can't decode VP8/VP9

Broadside-start orbit for natural turntable perspective

Re-add 4D visualization viewer; broadside-start orbit render

orbit render: raise elevation 12->25 deg to fix odd horse perspective

Re-add custom 4D viewer alongside splat+orbit viewers; raise orbit elevation to fix odd horse perspective

size ZeroGPU duration from measured runtime

object-centric orbit + per-frame recentred splats

Lift4D stages 1+2 on ZeroGPU: splat viewer + orbit video

Upload folder using huggingface_hub

initial commit