Chinese tech giant ByteDance has pledged to rein in a controversial AI video tool after Disney threatened legal action, accusing the company of supplying its Seedance platform with a “pirated library” of Marvel and Star Wars characters in what lawyers called a “virtual smash-and-grab” of intellectual property.
The move follows a flood of viral videos generated by Seedance’s latest 2.0 version, released February 12, showing Hollywood icons in scenes never filmed: Anakin Skywalker and Rey battling with lightsabers, Spider-Man fighting Captain America on New York streets, and Tom Cruise and Brad Pitt in imagined encounters.
Disney’s cease-and-desist letter, sent Friday, accused ByteDance of treating copyrighted characters as “public-domain clip art” and demanded the company immediately halt the tool’s ability to generate content featuring Disney-owned properties.
On Monday, ByteDance told the BBC it “respects intellectual property rights and we have heard the concerns regarding Seedance 2.0.” The company said it is “taking steps to strengthen current safeguards as we work to prevent the unauthorised use of intellectual property and likeness by users.”
ByteDance did not respond to questions about what those safeguards would look like or how they would be enforced.
Hollywood’s United Front
Disney’s legal threat is not an isolated action. The Motion Picture Association, which represents major studios including Warner Bros Discovery, Paramount, and Netflix, has demanded that Seedance “immediately cease its infringing activity.”
Actors’ union SAG-AFTRA has accused the platform of “blatant infringement,” raising concerns about the unauthorised use of performers’ likenesses.
The coordinated response reflects growing alarm across the entertainment industry as generative AI tools become sophisticated enough to create convincing video content featuring copyrighted characters and real actors—without permission, payment or oversight.
Japan Launches Investigation
The controversy extends beyond Hollywood. The Japanese government has launched an investigation into ByteDance over potential copyright violations after AI-generated videos featuring popular anime characters began appearing online.
Japan’s aggressive stance on copyright protection signals that ByteDance may face legal challenges across multiple jurisdictions as entertainment industries worldwide confront the implications of generative AI trained on copyrighted material.
What Seedance Does
Like other generative AI tools, Seedance creates videos based on short text prompts. Users can describe a scene—“Spider-Man fighting Captain America in New York“—and the platform generates a realistic video clip within minutes.
ByteDance has not disclosed what data it used to train Seedance. Disney’s lawyers allege the company assembled a “pirated library” of copyrighted material to train its AI, effectively treating Hollywood’s intellectual property as free raw material.
The company previously said it had paused users’ ability to upload images of real people to the platform, but that did not prevent the generation of videos featuring actors’ likenesses based on text prompts alone.
A Pattern of Lawsuits
Seedance is not the first AI platform to face legal action from Hollywood. Last year, Disney and NBCUniversal sued AI image generator Midjourney, accusing the platform of generating “endless unauthorised copies” of copyrighted works. That case is ongoing.
Disney has also asked Google to restrict the generation of its characters on Google’s AI platforms, seeking to prevent the tech giant’s tools from creating content featuring Mickey Mouse, Marvel heroes and other valuable properties.
What Comes Next
ByteDance’s pledge to strengthen safeguards may temporarily defuse the immediate legal threat, but fundamental questions remain unresolved: Can AI companies train their models on copyrighted material without permission? Who owns the output when a platform generates content featuring characters it did not create? And what protections exist for actors whose likenesses are reproduced without consent?
Disney’s cease-and-desist letter puts ByteDance on notice. The Motion Picture Association and SAG-AFTRA have drawn their lines. Japan has opened an investigation.
For now, ByteDance is promising to act. Whether its safeguards satisfy Hollywood—or merely delay the inevitable courtroom showdown—remains to be seen.
