我发现最好的解决办法就是把视频静音

HTML

<video loop muted autoplay id="videomain">
  <source src="videoname.mp4" type="video/mp4">
</video>

对我来说(在Angular项目中)，这段代码有帮助:

在HTML中，您应该添加自动播放静音

在JS / TS

playVideo() {
    const media = this.videoplayer.nativeElement;
    media.muted = true; // without this line it's not working although I have "muted" in HTML
    media.play();
}

您应该在videoElement中添加静音属性，以使代码正常工作。看下面..

<video id="IPcamerastream" muted="muted" autoplay src="videoplayback%20(1).mp4" width="960" height="540"></video>

不要忘记添加一个有效的视频链接作为源

我发现最好的解决办法就是把视频静音

HTML

<video loop muted autoplay id="videomain">
  <source src="videoname.mp4" type="video/mp4">
</video>

我有一个类似的问题，我需要播放视频没有静音。我这样做的方式，等待一秒钟，然后通过按钮触发事件。这是我的代码

if (playVideo == '1') {
    setTimeout(function() {
        $("#watch_video_btn").trigger('click');
    }, 1000);
}

扩展DOM元素，处理错误，优雅地降级

下面我使用原型函数来包装原生DOM播放函数，获取它的承诺，然后在浏览器抛出异常时将其降级为播放按钮。这个扩展解决了浏览器的缺点，是即插即用的任何页面与目标元素的知识(s)。

// JavaScript
// Wrap the native DOM audio element play function and handle any autoplay errors
Audio.prototype.play = (function(play) {
return function () {
  var audio = this,
      args = arguments,
      promise = play.apply(audio, args);
  if (promise !== undefined) {
    promise.catch(_ => {
      // Autoplay was prevented. This is optional, but add a button to start playing.
      var el = document.createElement("button");
      el.innerHTML = "Play";
      el.addEventListener("click", function(){play.apply(audio, args);});
      this.parentNode.insertBefore(el, this.nextSibling)
    });
  }
};
})(Audio.prototype.play);

// Try automatically playing our audio via script. This would normally trigger and error.
document.getElementById('MyAudioElement').play()

<!-- HTML -->
<audio id="MyAudioElement" autoplay>
  <source src="https://www.w3schools.com/html/horse.ogg" type="audio/ogg">
  <source src="https://www.w3schools.com/html/horse.mp3" type="audio/mpeg">
  Your browser does not support the audio element.
</audio>