At present, many online course websites play embedded Flash video courseware for teaching, and most of them block the video fast-forward (double-forward) playing function, so they can only drag and drop the video timeline progress bar after the whole video buffering is completed. In addition, the video buffering speed of website courseware is slow (some can be said to be tortoise speed), which increases the considerable time cost when using it, especially for some websites that need to brush classes.