VideoGenerationRequest schema

Field	Type and description
`model` Required	string Video generation model identifier.
`prompt` Required	string Text description of the desired video.
`negative_prompt`	string Text description of what to avoid.
`num_frames`	integer Number of frames to generate.
`width`	integer Video width in pixels.
`height`	integer Video height in pixels.
`seed`	integer Random seed for reproducibility.