I would like to ask why the use of object or embed tags to play videos in flv format can always be played only once!?

guys, recently, I have encountered a need to play a video in flv format on my computer. It is said on the Internet that it can be implemented with object or embed tags, so Baidu has such a code

<object class id="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab-sharpversion=7,0,19,0" width="300" height="240">
    <param name="movie" value="./Flvplayer.swf">
    <param name="quality" value="high">
    <param name="allowFullScreen" value="true">
    <param id="target1" name="FlashVars" value="vcastr_file=http://1255921568.vod2.myqcloud.com/d37eca2bvodgzp1255921568/62baee335285890782900323887/CzCKHQrYAAIA.flv">
    <embed id="target2" src="./Flvplayer.swf" allowfullscreen="true" flashvars="vcastr_file=http://1255921568.vod2.myqcloud.com/d37eca2bvodgzp1255921568/62baee335285890782900323887/CzCKHQrYAAIA.flv" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="300" height="240"></embed>
  </object>

this Flvplayer.swf is a plug-in, and I"ve downloaded it, but strangely enough, the video can only be played for the first time! After the broadcast, and then click play will not work, has been unable to play, I do not know what is going on!?

excuse me, did I not write down some parameter? Baidu did not find the answer, so I came to ask the question. I hope I can get the guidance from the boss. Thank you very much!