play iframe video on click a link javascript

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I have used a iframe video in my web page. This is my html code
</script>
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                <span>2020-12-29 12:07</span>
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<p>This works, it appends <code>autoplay=1</code> to the url causing the video to start playing. </p>

<p><em>addendum</em>: If your video's source does not already have a querystring then it would be prudent to add a <code>?</code> instead of a <code>&amp;</code>, as is sometimes the case. This can be done by looking for its existence.</p>

<pre><code>&lt;iframe id="video1" width="520" height="360" src="http://www.youtube.com/embed/TJ2X4dFhAC0?enablejsapi" frameborder="0" allowtransparency="true" allowfullscreen&gt;&lt;/iframe&gt;
&lt;a href="#" id="playvideo"&gt;Play video&lt;/a&gt;
&lt;script&gt;
 //use .one to ensure this only happens once
 $("#playvideo").one(function(){
  //as noted in addendum, check for querystring exitence
  var symbol = $("#video1")[0].src.indexOf("?") &gt; -1 ? "&amp;" : "?";
  //modify source to autoplay and start video
  $("#video1")[0].src += symbol + "autoplay=1";
 });
&lt;/script&gt;
</code></pre>

<p>However, most people inherently understand that if they want a video to play, they will just click on it and I would suggest just leaving that to them or starting the video off with autoplay.</p>

<p>Also need to mention that autoplay does not work on mobile devices (powered by Android or iOS)</p>
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                <span>2020-12-29 12:11</span>
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<p>since the first answer is already 3 years old, let me point to the Youtube Player API. With that you can remote control your embedded player.
See https://developers.google.com/youtube/iframe_api_reference?hl=en</p>

<p>With a small adjustment, you can start the video via link and without reloading the entire iframe:</p>

<pre><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
  &lt;body&gt;
    &lt;!-- 1. The &lt;iframe&gt; (and video player) will replace this &lt;div&gt; tag. --&gt;
    &lt;div id="player"&gt;&lt;/div&gt;

    &lt;!-- The Play-Link will appear in that div after the video was loaded --&gt;
    &lt;div id="play"&gt;&lt;/div&gt;

    &lt;script&gt;
      // 2. This code loads the IFrame Player API code asynchronously.
      var tag = document.createElement('script');

      tag.src = "https://www.youtube.com/iframe_api";
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

      // 3. This function creates an &lt;iframe&gt; (and YouTube player)
      //    after the API code downloads.
      var player;
      function onYouTubeIframeAPIReady() {
        player = new YT.Player('player', {
          height: '390',
          width: '640',
          videoId: 'M7lc1UVf-VE',
          events: {
            'onReady': onPlayerReady,
            'onStateChange': onPlayerStateChange
          }
        });
      }

      // 4. The API will call this function when the video player is ready.
      function onPlayerReady(event) {
        //event.target.playVideo();
        document.getElementById('play').innerHTML = '&lt;a href="#" onclick="play();"&gt;Play Video&lt;/a&gt;';
      }

      function play(){
        player.playVideo();
      }

      // 5. The API calls this function when the player's state changes.
      //    The function indicates that when playing a video (state=1),
      //    the player should play for six seconds and then stop.
      var done = false;
      function onPlayerStateChange(event) {
        if (event.data == YT.PlayerState.PLAYING &amp;&amp; !done) {
          setTimeout(stopVideo, 6000);
          done = true;
        }
      }
      function stopVideo() {
        player.stopVideo();
      }
    &lt;/script&gt;
  &lt;/body&gt;
&lt;/html&gt;
</code></pre>
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                <span>2020-12-29 12:12</span>
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<p>it's work for me.
please Check out this.</p>
<pre><code>$(&quot;#player&quot;).on(&quot;pause&quot;, function(e) {
          clearTimeout(playTimeout);
      });
      var tag = document.createElement('script');
      tag.src = &quot;https://www.youtube.com/iframe_api&quot;;
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
    
      var player;
        function onYouTubeIframeAPIReady() {
          player = new YT.Player('player', {
            height: '390',
            width: '640',
            videoId: 'M7lc1UVf-VE',
            events: {
              'onReady': onPlayerReady,
              'onStateChange': onPlayerStateChange
            }
          });
        }
      function onPlayerReady(event) {
        event.target.playVideo();
          }
       var done = false;
        function onPlayerStateChange(event) {
          if (event.data == YT.PlayerState.PLAYING &amp;&amp; !done) {
            setTimeout(stopVideo, 2000);//replace time here 
            $(&quot;#player&quot;).get(0).load();
            $(&quot;#player&quot;).get(0).pause();
            done = true;
          }
        }
        function stopVideo() {
          player.stopVideo();
        }
</code></pre>
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                <span>2020-12-29 12:21</span>
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<p>I correctly  set in end src - ?autoplay=1</p>

<pre><code>   &lt;iframe id="video1" width="450" height="280" src="http://www.youtube.com/embed/TJ2X4dFhAC0?enablejsapi" frameborder="0" allowtransparency="true" allowfullscreen&gt;&lt;/iframe&gt;
    &lt;a href="#" id="playvideo"&gt;Play button&lt;/a&gt;
    &lt;script&gt;
     $("#playvideo").click(function(){
      $("#video1")[0].src += "?autoplay=1";
     });
    &lt;/script&gt;
</code></pre>
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<p>Here is another example. Check this here: https://codepen.io/rearmustak/pen/VXXOBr</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>const Player = document.getElementById('player2');
const PlayBtn = document.getElementById('play');
const stopBtn = document.getElementById('stop');
let times = 0, playY;
const playVideo = PlayBtn.addEventListener( 'click' , () =&gt; {
    if(times == 0){
      playY = Player.src += '?autoplay=1';
      times = 1;
    }
});

stopBtn.addEventListener( 'click' , () =&gt; {
    playY = playY.slice(0, -11);
    Player.src = playY
    times = 0;
});</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>.video-frame{
  overflow: hidden;
  margin-bottom: 10px;
}
button{
  border: none;
  background-color: #e75252;
  color: #ffffff;
  padding: 10px 15px;
  border-radius: 3px;
  cursor: pointer;
}
button:focus{
  outline: 0;
}
#stop{
  background-color: #ff0002;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;h1&gt;Youtube video Play/Stop&lt;/h1&gt;

&lt;div class="video-frame"&gt;
  &lt;iframe id="player2" width="560" height="315" src="https://www.youtube.com/embed/cs1e0fRyI18" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen&gt;&lt;/iframe&gt;
&lt;/div&gt;

&lt;button id="play"&gt;Play&lt;/button&gt;
&lt;button id="stop"&gt;Stop&lt;/button&gt;</code></pre>
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                <span>2020-12-29 12:26</span>
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<p>here is link to example http://jsfiddle.net/WYwv2/5/</p>

<p>Check out this </p>

<pre><code>&lt;!DOCTYPE html&gt; 
&lt;html&gt; 
&lt;body&gt; 
&lt;a href="#" id="playvideo" onclick="playme()"&gt;Play video&lt;/a&gt;
    &lt;iframe id="video1" width="520" height="360"  frameborder="0" &gt;&lt;/iframe&gt;
&lt;script&gt;
function playme() {
document.getElementById("video1").src = 'http://www.w3schools.com/tags/mov_bbb.mp4';
}
&lt;/script&gt;
&lt;/body&gt; 
&lt;/html&gt;

</code></pre>

<p>We set the source of video dynamically.</p>
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            var editor = UE.getEditor('editor',{
                //这里可以选择自己需要的工具按钮名称,此处仅选择如下五个
                toolbars:[['source','fullscreen',  '|', 'undo', 'redo', '|', 'bold', 'italic', 'underline', 'fontborder', 'strikethrough', 'removeformat', 'formatmatch', 'autotypeset', 'blockquote', 'pasteplain', '|', 'forecolor', 'backcolor', 'insertorderedlist', 'insertunorderedlist', 'selectall', 'cleardoc', '|', 'rowspacingtop', 'rowspacingbottom', 'lineheight', '|', 'customstyle', 'paragraph', 'fontfamily', 'fontsize', '|', 'indent', '|', 'justifyleft', 'justifycenter', 'justifyright', 'justifyjustify', '|', 'link', 'unlink', 'anchor', '|', 'simpleupload', 'insertimage', 'scrawl', 'insertvideo', 'attachment', 'map', 'insertcode', '|', 'horizontal', '|', 'preview', 'searchreplace', 'drafts']],
            
                initialContent:'',
                //关闭字数统计
                wordCount:false,
                zIndex:2,
                //关闭elementPath
                elementPathEnabled:false,
                //默认的编辑区域高度
                initialFrameHeight:250
                //更多其他参数，请参考ueditor.config.js中的配置项
                //更多其他参数，请参考ueditor.config.js中的配置项
            });
                        editor.ready(function() {
            	editor.setDisabled();
            	});
                            $("#editor").find("*").css("max-width","362px");
        </script>              </div>
            </div>
                          
    

        
         <div class="layui-form-item">
                <label for="L_vercode" class="layui-form-label">验证码</label>
                <div class="layui-input-inline">
                  <input type="text"  id="code" name="code"   value="" required lay-verify="required" placeholder="图片验证码" autocomplete="off" class="layui-input">
                </div>
                <div class="layui-form-mid">
                  <span style="color: #c00;"><img class="hand" src="https://www.e-learn.cn/qa/user/code.html" onclick="javascript:updatecode();" id="verifycode"><a class="changecode"  href="javascript:updatecode();">&nbsp;看不清?</a></span>
                </div>
              </div>
                                  <div class="layui-form-item">
                    <input type="hidden" value="562932" id="ans_qid" name="qid">
   <input type="hidden" id="tokenkey" name="tokenkey" value=''/>
                <input type="hidden" value="play iframe video on click a link javascript" id="ans_title" name="title"> 
             
              <div class="layui-btn    layui-btn-disabled"  id="ajaxsubmitasnwer" >提交回复</div>
            </div>
          </form>
        </div>
      </div>
      <input type="hidden" value="562932" id="adopt_qid"	name="qid" /> 
      <input type="hidden" id="adopt_answer" value="0"	name="aid" />
    </div>
    <div class="layui-col-md4">
          
 <!-- 热门讨论问题 -->
     
 <dl class="fly-panel fly-list-one">
        <dt class="fly-panel-title">热议问题</dt>
            <!-- 本周热门讨论问题显示10条-->