Their lawsuit is based on the unsupported hypothesis that Google trained on their specific works. Even accepting their untested allegations as fact, the Complaint cannot stand. Plaintiffs each granted YouTube, and Google — which provides the service—a broad license to use the uploaded content. That license, present in YouTube’s Terms of Service, authorized the conduct alleged in the Complaint.

This is standard hedging for a legal filing: “you can’t prove we did it, and even if we did, we’re allowed to.” When asked directly if Google was using YouTube videos to train its Lyria 3 AI music model, the company declined to comment. But based on past public statements, it seems safe to assume the answer is yes.

In an interview from April 2024 with Bloomberg, YouTube CEO Neal Mohan said that “some portion” of YouTube videos may be used internally to train models like Gemini. Later that year, a blog post about creator tools confirmed as much, saying “we use content uploaded to YouTube to improve the product experience for creators and viewers across YouTube and Google, including through machine learning and AI applications.”

The company even confirmed to CNBC that it was using YouTube uploads to train Gemini and Veo. What Google hasn’t done is specifically confirm that it’s also using YouTube uploads to train Lyria.