Can the clip video of cat and mouse be original?

Of course. If you add background music, it can't be regarded as infringement. Video processing refers to processing other people's videos and uploading them to your account. Processing is a special term in short videos. Infringement refers to the act of infringing on the rights or interests of others. Including general tort and special tort, the former refers to the behavior that the actor directly causes damage to others based on fault, so the general liability clause in civil law applies. The latter refers to the behavior that the actor is not at fault, but should bear the responsibility according to the special liability clause of the civil law or the special provisions of the civil law.