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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> </head> <body> <video controls oncanplay="myFunction()"> <source src="mov_bbb.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> 您的浏览器不支持 HTML5 video 元素。 </video> <script> function myFunction() { alert("可以开始播放视频"); } </script> </body> </html>