From Torrent Freak:
With over a billion users YouTube is the largest video portal on the Internet.
Every day users watch hundreds of millions of hours of video on the site, and for many it’s a prime source to enjoy music as well.
While YouTube is a blessing to thousands of content creators, there are also concerns among rightsholders. Music labels in particular are not happy with the fact that music videos can be easily downloaded from the site with help from external services.
To address the problem YouTube is contacting these third party sites, urging them to shut down this functionality. Most recently, YouTube’s legal team contacted the popular download service TubeNinja.
“It appears from your website and other marketing materials that TubeNinja is designed to allow users to download content from YouTube,” the email from YouTube’s legal team reads.
According to YouTube the video downloader violates the terms of service (ToS) of both the site and the API. Among other things, YouTube’s ToS prohibits the downloading of any video that doesn’t have a download link listed on the site.
Later, Google’s video service adds that if the site owner continues to operate the service this “may result in legal consequences.”
Email from YouTube’s legal team
Despite the threatening language, TubeNinja owner Nathan doesn’t plan to take the functionality offline. He informed YouTube that his service doesn’t use YouTube’s API and says that it’s the responsibility of his users to ensure that they don’t violate the ToS of YouTube and TubeNinja.