My own video in Tik Tok is watermarked, because Tik Tok has established a copyright protection mechanism. Even if I save my own video, I don't allow users to forward and use it at will. Tik Tok's protection mechanism is to protect the content in the platform from copyright infringement, and also to protect the author's intellectual property rights. If users want to use the video, they can share it in Tik Tok instead of saving it. Copyright protection is a very important issue in online social media. Not only Tik Tok, but also other platforms, such as Weibo and WeChat. Take various ways to protect the author's copyright. Users should abide by relevant laws and regulations when using them, and must not infringe upon the intellectual property rights and copyrights of others, and at the same time, they should respect the labor achievements of others. If you need to use other people's content, you should obtain authorization or abide by relevant agreements.