现在要检查用户是否播放了完整视频,需要进行广泛的分析,检查他是否每次都播放.然而,这不是必需的,用户应该足够了：

>播放视频很长的秒数
>播放到视频结束

这个片段正是如此.如果您只是跳到最后,视频将不会被标记为完全播放.一遍又一遍地开始也不会标记它完全播放：

var video = document.getElementById("video");

var timeStarted = -1;
var timePlayed = 0;
var duration = 0;
// If video Metadata is laoded get duration
if(video.readyState > 0)
  getDuration.call(video);
//If Metadata not loaded,use event to get it
else
{
  video.addEventListener('loadedMetadata',getDuration);
}
// remember time user started the video
function videoStartedPlaying() {
  timeStarted = new Date().getTime()/1000;
}
function videoStoppedPlaying(event) {
  // Start time less then zero means stop event was fired vidout start event
  if(timeStarted>0) {
    var playedFor = new Date().getTime()/1000 - timeStarted;
    timeStarted = -1;
    // add the new ammount of seconds played
    timePlayed+=playedFor;
  }
  document.getElementById("played").innerHTML = Math.round(timePlayed)+"";
  // Count as complete only if end of video was reached
  if(timePlayed>=duration && event.type=="ended") {
    document.getElementById("status").className="complete";
  }
}

function getDuration() {
  duration = video.duration;
  document.getElementById("duration").appendChild(new Text(Math.round(duration)+""));
  console.log("Duration: ",duration);
}

video.addEventListener("play",videoStartedPlaying);
video.addEventListener("playing",videoStartedPlaying);

video.addEventListener("ended",videoStoppedPlaying);
video.addEventListener("pause",videoStoppedPlaying);

#status span.status {
  display: none;
  font-weight: bold;
}
span.status.complete {
  color: green;
}
span.status.incomplete {
  color: red;
}
#status.complete span.status.complete {
  display: inline;
}
#status.incomplete span.status.incomplete {
  display: inline;
}

<video width="200" controls="true" poster="" id="video">
    <source type="video/mp4" src="http://www.w3schools.com/html/mov_bbb.mp4"></source>
</video>

<div id="status" class="incomplete">
<span>Play status: </span>
<span class="status complete">COMPLETE</span>
<span class="status incomplete">INCOMPLETE</span>
<br />
</div>
<div>
<span id="played">0</span> seconds out of 
<span id="duration"></span> seconds. (only updates when the video pauses)
</div>

也就是jsFiddle：https://jsfiddle.net/p56a1r45/2/

然后,您可以将其连接到Google Analytics,以查看有多少视频用户播放.来自google analytics website的简单代码：

ga('send','event','Videos','play','Video name');