Your video will get a copyright claim if it contains copy-righted content. You can dispute the claim if you believe the claim is incorrect. Here's more info that should help you further: https://goo.gl/4ygXHn . Hope this helps clarify!
If there is a claim, then claim it! Why do you give false hope of a video prospering and doing well, only to shatter dreams by claiming it a year later @TeamYouTube ? It’s treacherous!!