How to AutoPlay Youtube video in wp8 webBrowser control Ifra

Hi,
I want to Autoplay youtube video in wp8 webbrowser control using IFrame my code is.
string ss = "" +     "" +     "<span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;"> </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;"> youtubeIDS </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;"> </span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: #800000;">"&playsinline=1&controls=0\" frameborder=\"0\" allowfullscreen>"</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;"> </span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">+</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">     </span><span class="str" style="margin: 0px; padding: 0px; border: 0px; color: #800000;">""</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">;</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">  webbrowser</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">.</span><span class="typ" style="margin: 0px; padding: 0px; border: 0px; color: #2b91af;">NavigatetoString</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">(</span><span class="pln" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">ss</span><span class="pun" style="margin: 0px; padding: 0px; border: 0px; color: #000000;">);<br /><br /><br /><span style="color: #404040; font-family: verdana, sans-serif; white-space: normal; background-color: #ffffff;">but not able to Autoplay the Video.</span></span></code></pre></div></article><section class="comments" id="replies"><header class="comments-head"><span class="comments-badge" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="19" height="19" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true" focusable="false"><path d="M3 3h10a2 2 0 0 1 2 2v4.5a2 2 0 0 1-2 2H7.5L4 14.5V11.5H3a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2z"></path></svg></span><div><h2 class="comments-title">Replies</h2><p class="comments-sub">Know the answer? Post it — somebody with the same question will find it here.</p></div></header><div class="comment-signin"><span class="comment-signin-badge" aria-hidden="true"><svg viewBox="0 0 20 20" fill="none" stroke="currentColor" stroke-width="1.6"><path d="M11.5 3.5h3.2a1 1 0 0 1 1 1v11a1 1 0 0 1-1 1h-3.2" stroke-linecap="round"></path><path d="M4.5 10h7" stroke-linecap="round"></path><path d="M8.8 7.2 11.6 10l-2.8 2.8" stroke-linecap="round" stroke-linejoin="round"></path></svg></span><div class="comment-signin-body"><p class="comment-signin-title">Sign in to <!-- -->answer this question</p><p class="comment-signin-text">It is the same account you read, post and publish with — and you will come straight back to this page.</p></div><div class="comment-signin-actions"><a class="btn primary-btn comment-signin-btn" href="/login?returnurl=%2Fforums%2Fhow-to-autoplay-youtube-video-in-wp-webbrowser-control-ifra">Sign in</a><a class="comment-signin-alt" href="/register?returnurl=%2Fforums%2Fhow-to-autoplay-youtube-video-in-wp-webbrowser-control-ifra">Create an account</a></div></div></section></div></div><script>$RS=function(a,b){a=document.getElementById(a);b=document.getElementById(b);for(a.parentNode.removeChild(a);a.firstChild;)b.parentNode.insertBefore(a.firstChild,b);b.parentNode.removeChild(b)};$RS("S:2","P:2")</script><script>$RB=[];$RV=function(a){$RT=performance.now();for(var b=0;b<a.length;b+=2){var c=a[b],e=a[b+1];null!==e.parentNode&&e.parentNode.removeChild(e);var f=c.parentNode;if(f){var g=c.previousSibling,h=0;do{if(c&&8===c.nodeType){var d=c.data;if("/$"===d||"/&"===d)if(0===h)break;else h--;else"$"!==d&&"$?"!==d&&"$~"!==d&&"$!"!==d&&"&"!==d||h++}d=c.nextSibling;f.removeChild(c);c=d}while(c);for(;e.firstChild;)f.insertBefore(e.firstChild,c);g.data="$";g._reactRetry&&requestAnimationFrame(g._reactRetry)}}a.length=0};
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