The works published by 1. are under review. The review of some works is slow and takes some time, so others can't see it when reviewing.
2. The work was deleted without approval. Because the work involves some sensitive content, it can't be published, and it has been deleted by the system, so naturally it can't be displayed on its home page.
3. When the author released the video, it was set that only friends could watch it. When an author publishes a video, it can be set that only his friends can view it, but if you are not his friends, you can't see the works displayed on his page.
4. When the author released the video, he set it as a private work. After the author is set to private, no one can read it. As long as the author can understand it, others will not display the works set as private when they enter his page.