If a self-made video was uploaded to a video platform such as Bilibili, the copyright of the video would belong to the platform or the author, depending on the specific situation. Under normal circumstances, the copyright of the video belonged to the author of the video. This was because the video author enjoyed copyright when creating the video, including the original and creative content of the video content, audio and video format, etc. If the video was originally created by the author, the copyright of the video would belong to the author. However, if the video platform obtained the copyright of the video content during the operation process, such as obtaining authorization from the author or purchasing the copyright for the platform operation, the video platform would have the copyright of the video content. In this case, the video platform could decide whether to publicize, share, or distribute the video and how to share and distribute the video. Therefore, if a self-made video was sent to a video platform, one needed to understand the specific copyright laws and regulations to ensure that they enjoyed the copyright of the video content and complied with the relevant laws and regulations.