? I can help you locate a particular piece of media if you have more details!
Most mainstream Hollywood movies—including Sing (2016)—are protected by copyright. They are not part of the public domain. Therefore, you will not find a legitimate, authorized copy of Sing hosted permanently on the Internet Archive. Uploading full, copyrighted commercial films to the Archive without permission violates U.S. copyright law and the Archive’s own terms of use. sing 2016 internet archive
The paper likely quantifies "link rot." It uses the Internet Archive to show how quickly the web disappears. A finding common in this era of research is that a massive percentage of links created just a few years prior are already dead, with the Internet Archive being the only repository keeping the "memory" alive. They are not part of the public domain
. While the full movie is generally not available for free streaming due to copyright, you can find several behind-the-scenes and teaser items: "Sing" (2016) Media on Internet Archive Official Teaser (HD) : A high-definition Official Teaser copyright law and the Archive’s own terms of use
Given the phrasing, the most prominent and "interesting" paper fitting this description is likely: