Other: runway_video2video API

runway_video2video is Runway's premier model dedicated to video-to-video synthesis, currently spearheaded by the Gen-4 Aleph iteration. Its core strength lies in "structure-aware restyling": it takes a source video and, guided by text prompts or reference images, completely reimagines the visual aesthetic while preserving the original motion, camera movement, and subject placement. The Gen-4 Aleph version features an advanced "Structure Transformation" control, allowing creators to dial in the balance between strict adherence to the source footage and creative deviation. It serves as a critical asset for ad creative, VFX, and animation pipelines.