What do we do when our movies on YouTube is copyrighted?

The copyright holder can file a DMCA claim against the violator, to get YouTube to either delete the video, or remove the soundtrack. YouTube has state-of-the-art technology that allows content owners to identify user-uploaded videos and audio comprised of their content, and choose what they want to happen when those videos are found. You can file a copyright notification using their webform. It also has a Content Verification program where you can submit multiple copyright notifications. The Content ID program allows copyright owners to identify user uploaded videos and decide whether they want to block or delete or monetize those videos. These tools have really helped YouTube and copyright owners fight copyright infringements or violations. If you remember the huge furore over the copyright issues filed by Viacom and the debates with the consortium of Japanese TV, music, and film companies really helped in making stricter and more effective copyright controls for YouTube.