Efficient-Large-Model/SANA-Video_2.0_5B_720p_4step

Document duration controls and scale 0.7 default

Update preview LoRA metadata for scale 0.7 default

Document RL scale controls and refresh verified demo

Update four-step preview weights and add RL LoRA control

Link the upstream four-step preview PR

Add files using upload-large-folder tool

initial commit