There is some music videos on youtube that I need to include in my videos. these are official videos owned by big companies. When I did this, I immediately got a notice that my videos contain copyrighted material ("but no action is required of you at this time") then a few hours later, video got taken down. "We have disabled your video material as a result of third-party notification blah blah...." I am wondering if these get detected by software or human beings? is there a way to make the videos pass the software tests? like insert a sound in there that the software can see but humans can't hear?