contains a ndarray of the generated video, when output_type != "latent", otherwise a
latent code of generated videos and a list of bools indicating whether the corresponding generated
video contains “not-safe-for-work” (nsfw) content..
  The call function to the pipeline for generation.  backward_loop  < source > ( latents timesteps prompt_embeds guidance_scale callback callback_steps num_warmup_steps extra_step_kwargs cross_attention_kwargs = 