文章目錄
這一篇介紹如何在GTM上對H5視頻做追蹤蹤，其實H5視頻的追蹤和Vimeo的是一樣的，延伸閱讀：Google Tag Manager上對Vimeo視頻做追蹤(GA4)
實現方式
通過GTM裡注入一段JavaScript去監聽H5視頻的加載，然後在通過dataLayer.push發送事件，如JavaScript如下：
<script>
// Let's wrap everything inside a function so variables are not defined as globals
(function() {
// This is gonna our percent buckets ( 25%-75% )
var divisor = 25;
// We're going to save our players status on this object.
var videos_status = {};
// This is the funcion that is gonna handle the event sent by the player listeners
function eventHandler(e) {
switch (e.type) {
// This event type is sent everytime the player updated it's current time,
// We're using for the % of the video played.
case 'timeupdate':
// Let's set the save the current player's video time in our status object
videos_status[e.target.id].current = Math.round(e.target.currentTime);
// We just want to send the percent events once
var pct = Math.floor(100 * videos_status[e.target.id].current / e.target.duration);
for (var j in videos_status[e.target.id]._progress_markers) {
if (pct >= j && j > videos_status[e.target.id].greatest_marker) {
videos_status[e.target.id].greatest_marker = j;
}
}
// current bucket hasn't been already sent to GA?, let's push it to <a href="https://www.haranhuang.com/tag/gtm" title="查看更多关于GTM的文章" target="_blank">GTM</a>
if (videos_status[e.target.id].greatest_marker && !videos_status[e.target.id]._progress_markers[videos_status[e.target.id].greatest_marker]) {
videos_status[e.target.id]._progress_markers[videos_status[e.target.id].greatest_marker] = true;
dataLayer.push({
'event': 'video',
'video_status': 'progress',
'video_provider' : 'generic html5 video player',
'video_percent': videos_status[e.target.id].greatest_marker,
// We are sanitizing the current video src string, and getting just the video name part
'video_title': decodeURIComponent(e.target.currentSrc.split('/')[e.target.currentSrc.split('/').length - 1])
});
}
break;
// This event is fired when user's click on the play button
case 'play':
dataLayer.push({
'event': 'video',
'video_status' : 'play',
'video_provider' : 'generic html5 video player',
'video_percent': videos_status[e.target.id].greatest_marker,
'video_title': decodeURIComponent(e.target.currentSrc.split('/')[e.target.currentSrc.split('/').length - 1])
});
break;
// This event is fied when user's click on the pause button
case 'pause':
if (videos_status[e.target.id].greatest_marker < '75') {
dataLayer.push({
'event': 'video',
'video_status' : 'pause',
'video_provider' : 'generic html5 video player',
'video_percent': videos_status[e.target.id].greatest_marker,
'video_title': decodeURIComponent(e.target.currentSrc.split('/')[e.target.currentSrc.split('/').length - 1])
});
}
break;
// If the user ends playing the video, an Finish video will be pushed ( This equals to % played = 100 )
case 'ended':
dataLayer.push({
'event': 'video',
'video_status' : 'complete',
'video_provider' : 'generic html5 video player',
'video_percent': '100',
'video_title': decodeURIComponent(e.target.currentSrc.split('/')[e.target.currentSrc.split('/').length - 1])
});
break;
default:
break;
}
}
// We need to configure the listeners
// Let's grab all the the "video" objects on the current page
var videos = document.getElementsByTagName('video');
for (var i = 0; i < videos.length; i++) {
// In order to have some id to reference in our status object, we are adding an id to the video objects
// that don't have an id attribute.
var videoTagId;
if (!videos[i].getAttribute('id')) {
// Generate a random alphanumeric string to use is as the id
videoTagId = 'html5_video_' + Math.random().toString(36).slice(2);
videos[i].setAttribute('id', videoTagId);
}// Current video has alredy a id attribute, then let's use it <img draggable="false" class="emoji" alt="?" src="https://s.w.org/images/core/emoji/2/svg/1f642.svg">
else {
videoTagId = videos[i].getAttribute('id');
}
// Video Status Object declaration
videos_status[videoTagId] = {};
// We'll save the highest percent mark played by the user in the current video.
videos_status[videoTagId].greatest_marker = 0;
// Let's set the progress markers, so we can know afterwards which ones have been already sent.
videos_status[videoTagId]._progress_markers = {};
for (j = 0; j < 100; j++) {
videos_status[videoTagId].progress_point = divisor * Math.floor(j / divisor);
videos_status[videoTagId]._progress_markers[videos_status[videoTagId].progress_point] = false;
}
// On page DOM, all players currentTime is 0
videos_status[videoTagId].current = 0;
// Now we're setting the event listeners.
videos[i].addEventListener("play", eventHandler, false);
videos[i].addEventListener("pause", eventHandler, false);
videos[i].addEventListener("ended", eventHandler, false);
videos[i].addEventListener("timeupdate", eventHandler, false);
videos[i].addEventListener("ended", eventHandler, false);
}
})();
</script>
設定過程
添加H5視頻監聽代碼
變數
在GTM中點擊「變數」——「新增」——「請選擇變數類型以開始設定…」——「自訂 JavaScript」，命名為 “cjs – is HTML5 Video on a page”, 然後做如下設定：
這個變數是用於判斷H5视频是否已經加載好。
使用到的代碼：
function () {
var video = document.getElementsByTagName('video').length;
if (video > 0) {
return true;
}
else {
return false;
}
}
觸發器
在GTM中點擊「觸發條件」—「新增」—「選擇一個觸發條件類型以開始設定」——「網頁瀏覽 – 視窗已載入」，命名為“Pageview – HTML5 Video Player is Present”，然後做如下設定：
代碼
在GTM中點擊「代碼」—「新增」—「請選擇代碼類型以開始設定…」——「自訂HTML」，命名為“cHTML – HTML5 Video Listener”，然後做如下設定：
這裡的程式就是實現方式裡的JavaScript。
設定事件
變數
從JavaScript裡，可以知道變數是video_status、video_percent和video_provider。
在GTM中點擊「變數」——「新增」——「請選擇變數類型以開始設定…」——「資料層變數」，命名為 “dlv – video_status”, 然後做如下設定：
同理設定video_percent和video_provider。
觸發器
從JavaScript裡，可以知道event是video。
在GTM中點擊「觸發條件」—「新增」—「選擇一個觸發條件類型以開始設定」——「自訂事件」，命名為“Custom – Video Interaction”，然後做如下設定：
代碼
最後就是設定代碼。
在GTM中點擊「代碼」—「新增」—「請選擇代碼類型以開始設定…」——「Google Analytics（分析）：GA4 事件」，命名為“Event—H5 Video Tracking”，做如下設定：
預覽
接下來就是預覽調試，你可以用以下任意方法：
最後還需要將事件參數在GA4的自訂定義裡註冊。
Referral：
- https://www.thyngster.com/tracking-html5-videos-gtm/
- https://www.analyticsmania.com/post/track-html5-video-player-with-google-analytics-4-and-google-tag-manager/
如果您在操作上仍有任何疑問，歡迎留言交流，或加入：Google Analytics 4交流社團發問
