As long as you upload a video online, it will last forever. Open a video website and register an account. When you have an account, there is an "upload" button in the upper right corner, which can upload videos from your computer. After you succeed, you succeed. Remember your account number, and you can find it after years of typing. If you forget your account, you can also find it by entering your video name on Baidu video.
The video must be added to the class. After the class hours are released and the course is released, the video class hours will be displayed in the course catalogue, and students will learn about the class hours after joining the course. Course files are only stored, so students can't see the videos uploaded here!