Sometimes a video requires some content that does not belong to the video-maker and if such a video is uploaded to YouTube, a Copyright notice may be received and acknowledging such notice, though securing the video from actions against it under Copyright law, allows the Copyright holder to impose unreasonable restrictions. This, in turn, enchains syndication and proper viewing of the video which can be a big problem for the video-maker. Lets have a look at how to resolve that.
Step 1: Go to Video Manager of the YouTube channel and click on "Matched third party content" besides the Edit button just below the video title. Then click on Acknowledge to accept the usage of Copyrighted content. After this step, the restrictions imposed by the Copyright holder are applied.
Step 2: Go to Video Manager of the YouTube channel and click on "Acknowledged third party content" besides the Edit button just below the video title and choose "My use of the content meets the legal requirements for fair use or fair dealing under applicable copyright laws." as the dispute reason.
Step 3: Now, click "I am sure that my video meets the legal requirements for fair use and I want to dispute this claim".
Step 4: Now, in the "reason for dispute" box, type in your reason as "This video uses copyrighted material in a manner that does not require approval of the copyright holder. It is fair use under copyright law" (without the quotes).
Note: Click on Edit, go to Advanced Settings and then to Syndication. If it is showing Everywhere, then you are good to go otherwise check Mobile Platform.
Et voilà, the restrictions (except that of monetization) imposed by the Copyright maker will now be relieved.
Here is a video of the method to help you with the process.