I want to find the source address of the video from the web page. This is the code on the web page. How can I analyze the source address from here?

<embed name="prism-player-4F5FF2FD-7BD8-4E9D-A852-C1B400332904" src="//g.alicdn.com/de/prismplayer-flash/2.7.1/PrismPlayer.swf" quality="high" pluginspage="//www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="100%" height="100%" allowscriptaccess="always" allowfullscreen="true" allowfullscreeninteractive="true" wmode="opaque" flashvars="autoPlay=1&isInner=0&actRequest=1&vid=53b13643346a48b8b6e75b6bb3b25c8a&domain=//tv.taobao.com&statisticService=https://videocloud.cn-hangzhou.log.aliyuncs.com/logstores/newplayer/track&videoInfoService=/player/json/getBaseVideoInfo.do&disablePing=0&namespace=prism-player-4F5FF2FD-7BD8-4E9D-A852-C1B400332904&barMode=1&isLive=0&waterMark=undefined&environment=undefined&vurl=&plugins=&snapShotShow=0&accessId=&accessKey=&apiKey=&flashApiKey=&disableSeek=0&disableFullScreen=0&stsToken=&domainRegion=&authInfo=&playDomain=&stretcherZoomType=&playauth=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%2Bb5bqm5qih5Z6LIC5tcDQiLCJDb3ZlclVSTCI6Imh0dHA6Ly9tdi5hdXJhLWVsLmNvbS9zbmFwc2hvdC81M2IxMzY0MzM0NmE0OGI4YjZlNzViNmJiM2IyNWM4YTAwMDA1LmpwZyIsIkR1cmF0aW9uIjo2MzcuMjd9LCJBY2Nlc3NLZXlJZCI6IlNUUy5OSGdIS0NrUURlZnJtU1hSVzhOMTlmUFJFIiwiUGxheURvbWFpbiI6Im12LmF1cmEtZWwuY29tIiwiQWNjZXNzS2V5U2VjcmV0IjoiQ2s2TEhNNE1qTThHQXZDazFlc2pldXF4VEVxNTF0TEE4UWttbnFwVERDVXgiLCJSZWdpb24iOiJjbi1zaGFuZ2hhaSIsIkN1c3RvbWVySWQiOjEzNzUwMTM3ODM0NDE0NjN9&prismType=0&formats=&notShowTips=0&showBarTime=5000&showBuffer=1&rePlay=0&encryp=&secret=&mediaType=video&logInfo=%7B%22ud%22%3A%22%22%2C%22os%22%3A%22macOS%22%2C%22ov%22%3A%2210.13.6%22%2C%22et%22%3A%22Chrome%22%2C%22ev%22%3A%2270.0.3538.110%22%2C%22uat%22%3A%22Mozilla%2F5.0%20(Macintosh%3B%20Intel%20Mac%20OS%20X%2010_13_6)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F70.0.3538.110%20Safari%2F537.36%22%2C%22r%22%3A%22https%253A%252F%252Fyun.aura.cn%252FUser%252FmyLessons.html%22%2C%22pu%22%3A%22https%253A%252F%252Fyun.aura.cn%252FVideo%252Fplay%252Flid%252F936.html%22%2C%22app_n%22%3A%22yun.aura.cn%22%7D&languageData=%7B%22OD%22%3A%22%E5%8E%9F%E7%94%BB%22%2C%22FD%22%3A%22%E6%B5%81%E7%95%85%22%2C%22LD%22%3A%22%E6%A0%87%E6%B8%85%22%2C%22SD%22%3A%22%E9%AB%98%E6%B8%85%22%2C%22HD%22%3A%22%E8%B6%85%E6%B8%85%22%2C%222K%22%3A%222K%22%2C%224K%22%3A%224K%22%2C%22FHD%22%3A%22%E5%85%A8%E9%AB%98%E6%B8%85%22%2C%22XLD%22%3A%22%E6%9E%81%E9%80%9F%22%2C%22Forbidden_Text%22%3A%22%E5%86%85%E9%83%A8%E4%BF%A1%E6%81%AF%EF%BC%8C%E4%B8%A5%E7%A6%81%E5%A4%96%E4%BC%A0%22%2C%22Refresh%22%3A%22%E5%88%B7%E6%96%B0%22%2C%22Diagnosis%22%3A%22%E8%AF%8A%E6%96%AD%22%2C%22Live_Finished%22%3A%22%E7%9B%B4%E6%92%AD%E5%B7%B2%E7%BB%93%E6%9D%9F%2C%E8%B0%A2%E8%B0%A2%E8%A7%82%E7%9C%8B%22%2C%22Play%22%3A%22%E6%92%AD%E6%94%BE%22%2C%22Pause%22%3A%22%E6%9A%82%E5%81%9C%22%2C%22Snapshot%22%3A%22%E6%88%AA%E5%9B%BE%22%2C%22Replay%22%3A%22%E9%87%8D%E6%92%AD%22%2C%22Live%22%3A%22%E7%9B%B4%E6%92%AD%22%2C%22Encrypt%22%3A%22%E5%8A%A0%E5%AF%86%22%2C%22Sound%22%3A%22%E5%A3%B0%E9%9F%B3%22%2C%22Fullscreen%22%3A%22%E5%85%A8%E5%B1%8F%22%2C%22Exist_Fullscreen%22%3A%22%E9%80%80%E5%87%BA%E5%85%A8%E5%B1%8F%22%2C%22Resolution%22%3A%22%E6%B8%85%E6%99%B0%E5%BA%A6%22%2C%22Next%22%3A%22%E4%B8%8B%E4%B8%80%E9%9B%86%22%2C%22Brightness%22%3A%22%E4%BA%AE%E5%BA%A6%22%2C%22Default%22%3A%22%E9%BB%98%E8%AE%A4%22%2C%22Contrast%22%3A%22%E5%AF%B9%E6%AF%94%E5%BA%A6%22%2C%22Titles_Credits%22%3A%22%E7%89%87%E5%A4%B4%E7%89%87%E5%B0%BE%22%2C%22Skip_Titles%22%3A%22%E8%B7%B3%E8%BF%87%E7%89%87%E5%A4%B4%22%2C%22Skip_Credits%22%3A%22%E8%B7%B3%E8%BF%87%E7%89%87%E5%B0%BE%22%2C%22Not_Support_Out_Site%22%3A%22%E8%AF%A5%E8%A7%86%E9%A2%91%E6%9A%82%E4%B8%8D%E6%94%AF%E6%8C%81%E7%AB%99%E5%A4%96%E6%92%AD%E6%94%BE%EF%BC%8C%E8%AF%B7%E5%88%B0%E6%B7%98TV%E8%A7%82%E7%9C%8B%22%2C%22Watch_Now%22%3A%22%E7%AB%8B%E5%8D%B3%E8%A7%82%E7%9C%8B%22%2C%22Network_Error%22%3A%22%E7%BD%91%E7%BB%9C%E6%97%A0%E6%B3%95%E8%BF%9E%E6%8E%A5%EF%BC%8C%E8%AF%B7%E5%B0%9D%E8%AF%95%E6%A3%80%E6%9F%A5%E7%BD%91%E7%BB%9C%E5%90%8E%E5%88%B7%E6%96%B0%E8%AF%95%E8%AF%95%22%2C%22Video_Error%22%3A%22%E8%A7%86%E9%A2%91%E6%92%AD%E6%94%BE%E5%BC%82%E5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