为了防止在播放前加载HTML5视频，请使用preload属性。您可以尝试运行以下代码：
<!DOCTYPE html> <html> <body> <video width = "350" height = "200" controls = "controls" preload = "none"> <source src = "movie.mp4" type = "video/mp4" /> <source src = "movie.ogg" type = "video/ogg" /> Your browser does not support the video tag. </video> </body> </html>