Genjutsu AI is a web based video generation tool that allows users to create new versions of existing videos by swapping in their own people, pets, or products. The primary function is motion transfer, where a reference clip dictates the action while user supplied photos determine the new cast, and object swap, which places a different product or prop into an existing scene. Users can start from a community preset or upload their own reference clip, then replace the example images with clear photos assigned to numbered roles. The workflow includes previewing the scene, reviewing the model and settings, checking a credit estimate, signing in, and generating the final video, which is then available in the My creations section for review and download. The tool offers a range of prebuilt presets, such as Smalltown Boy AI, Phone Stuck to Train AI, Ozil Goal AI, and Single Ladies Dog AI, among others. These presets combine a clip with starting references and instructions, allowing users to adapt them with their own photos or modify the prompt. Duet and crowd presets identify each photo role, while a pet preset is available for featuring animals. Users can also upload their own reference clip and set up a custom video edit with replacement photos and a prompt. The platform notes that exact reproduction of product shapes or labels is not guaranteed, and users must confirm media permissions and accept the Use Policy before generating. Typical use cases include recasting a dance, gesture, or short performance with a different person or pet, bringing a product or vehicle into an existing scene for visual comparison, and exploring character changes or cinematic scenes without building a setup from scratch. The service is designed as a single workspace for motion transfer and object swap, with community examples serving as creative directions rather than results generated on the site. The tool is accessible at aigenjutsu.app and operates through a credit based system with sign in required for generation.