Will there be copyright infringement if there are so many videos of uploaders moving YouTube videos on site B?

The core legal judgment is that the systematic uploading of YouTube videos to another site, referred to here as Site B, constitutes a clear and widespread risk of copyright infringement. This activity typically violates the exclusive rights of the copyright holder, which include the rights of reproduction, distribution, and public display. The fact that the content originated on YouTube is largely irrelevant from a copyright perspective; YouTube is a distribution platform, not a copyright owner unless it specifically produces the content itself. The standard YouTube terms of service grant users a limited license to upload content, but this license is non-transferable and does not authorize third parties to download and re-upload that content to other commercial platforms. Therefore, the primary infringing actors are the uploaders on Site B, as they are engaging in unauthorized copying and redistribution.

The mechanism of infringement hinges on the absence of necessary licenses. For each video transferred, the uploader on Site B would need permission from all relevant rights holders, which may include the video creator, any featured musicians, and potentially other entities. The prevalence of such activity does not diminish its illegality; instead, it often indicates a platform with inadequate copyright compliance mechanisms. Site B itself may face secondary liability, such as contributory or vicarious infringement, if it is found to have knowledge of the infringing activity and materially contributes to it or benefits financially from it while having the right and ability to stop it. The legal landscape, particularly influenced by the U.S. Digital Millennium Copyright Act (DMCA) and similar regimes internationally, provides a framework where copyright owners can issue takedown notices to Site B. If Site B fails to respond appropriately to valid notices, it risks losing its safe harbor protections, opening itself to direct liability.

The implications are significant for all parties involved. For creators, this activity directly undermines their control over distribution, monetization, and audience analytics, potentially diverting advertising revenue and compromising their ability to manage their intellectual property strategically. For Site B, hosting a large volume of such content presents a substantial legal and business risk, potentially leading to costly litigation, injunctions, and reputational damage as a haven for pirated material. The practical outcome often involves a continuous cycle of notice-and-takedown actions, automated content identification systems, and potential legal action against prolific uploaders. While fair use defenses may be invoked in specific cases—for instance, for critique, commentary, or transformative works—the mere act of reposting an entire video to a different platform without alteration or added context almost never qualifies as fair use. The scale of the activity described suggests a systemic issue rather than isolated instances of potentially protected use, making large-scale infringement the overwhelmingly likely legal characterization.