我的视频在火狐浏览器中为什么不显示？

<embed src="https://imgcache.qq.com/tencentvideo_v1/playerv3/TPout.swf?max_age=86400&v=20161117&vid=i0502x8do8q&auto=0" allowFullScreen="true" quality="high" width="315" height="200" align="middle" allowScriptAccess="always" type="application/x-shockwave-flash"></embed>