The Recording Industry Association of America, Inc. (RIAA) has taken down YouTube-dl’s GitHub repositories using a DMCA takedown notice. The RIAA filed a DMCA (Digital Millennium Copyright Act) infringement notice with GitHub. The notice states that the repository should be taken down because it allows for downloading copyrighted music and is therefore illegal under both USA and German law. The successful use of a DMCA infringement notice to shutdown software that is in itself not a copyright violation is a scary precedent and one that lays the groundwork for misuse in the future.
Source: https://www.bleepingcomputer.com/news/software/youtube-dl-removed-from-github-after-riaa-dmca-notice/