YouTube uses a system called ContentID to match audio and video content across the website. By registering material with ContentID, a content owner can protect their stuff from being used by people without permission. They can simply monitor it, monetize it or punish the channel for uploading it by way of video removal. Further, they can issue a DMCA takedown but that is a separate matter entirely. Now, many YouTube networks have a ContentID account. This is in large part due to their close working relationship with YouTube and allows them to legally and monetarily protect their content by registering it with ContentID. That way if a channel reuploads something the network owns, the revenue (or punishment) goes as it should. However, some content owners are a little less scrupulous, or more correctly care less about the impact of their actions. These content owners bulk register all content under their account with ContentID instead of carefully identifying only the content that they actually own the rights to. As a result of this, a video which also happens to contain material they don't own, is registered in such as way as to appear that they do own it. By doing this, they now claim material containing that content despite not having the rights to it. Several recent examples include trailers from certain video games as well as soundtrack material utilized in remix music. If you receive a copyright claim (Third Party Content Match) and the company claiming the material isn't one that you recognize, it's time to start doing some research. An example would be a song from a Universal Music Group artist being claimed by a company like AdRev. If you cannot find any linkage between the company claiming the material and the company that you know owns it, you are very likely safe in disputing the content match. Personally, I recommend the following text. Insert the appropriate company name and content use policy URL as needed. You don't need it to be very long either. "The audio and visual content contained within this presentation is used with permission from ZZZZZZZZZZZZ. Please review their content policy at www.ZZZZZZZZ.com/ZZZZZZZ. This claim has been made in error, is invalid and must legally be rescinded. Please proceed at your earliest convenience."