AI video generators turn text prompts, still images, or reference clips into short video shots, and many now add synchronized audio, camera control, and editing of existing footage. This category covers standalone studios, model-hub platforms that bundle third-party models, and research-lab models offered through apps and APIs. When comparing tools, look at maximum clip length and resolution, how credits are priced and whether they roll over, commercial-use rights on each plan, reference and keyframe controls for consistent characters, and whether an API is available for production pipelines.