Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to unblock copyright infringement on youtube [title] Understand why you may have received a content id claim. [step] Content id is a system that identifies potential copyrighted content in videos by scanning uploaded videos for previously-uploaded content. The system will scan for audio, video, and images.

Ending1: [title] Answer as many questions as you can. [step] If you are currently having trouble out of confusion or have not answered a question assigned by your user, then this is a great way to check for copyright infringement. Ending2: If a match occurs, the original owner is notified and a content id claim is filed. [substeps] The original owner can choose to do nothing, mute their audio in your video, block the video from being viewed, monetize the video, or track the video's viewership. Ending3: [title] Figure out whether you have used the content id app. [step] Copyright-infringement lawsuits can take up to a few years to fully prove that you use the content id app in your videos. Ending4: If you have uploaded video videos to youtube, it will scan for audio, video, and images in your channel. You may receive your content id when you sign up for a video profile.

Answer format: ending1/ending2/ending3/ending4