Brightcove Player Sample: Are You Still Watching?

Video Cloud
Brightcove Player
Player Developer
Advanced HTML/CSS
Code Samples

In this topic, you will learn how to create a Brightcove player that detects when the viewer has stopped watching, while leaving the video playing.

Player example

In this sample you will see after a set amount of time, an overlay message is displayed. If the viewer clicks the message within a specified time, then playback continues. If not, the video is paused. This technique is useful if you have long-form content. This will keep you from wasting bandwidth on viewers who start playing a video and then leave to do something else without bothering to stop it.

See the Pen 18189-are-you-still-watching by Brightcove Learning Services (@rcrooks1969) on CodePen.

View the source code.

View source code for the same solution that works across Video Cloud playlists.

View source code for the same solution that works across Brightcove Player playlists.

Using the CodePen

Here are some tips to effectively use the above CodePen:

  • Toggle the actual display of the player by clicking the Result button.
  • Click the HTML/CSS/JS buttons to display ONE of the code types.
  • Later in this document the logic, flow and styling used in the application will be discussed in the Player/HTML configuration, Application flow and Application styling sections. The best way to follow along with the information in those sections is to:
    1. Click the EDIT ON CODEPEN button in the CodePen and have the code available in one browser/browser tab.
    2. In CodePen, adjust what code you want displayed. You can change the width of different code sections within CodePen.
    3. View the Player/HTML configuration, Application flow and/or Application styling sections in another browser/browser tab. You will now be able to follow the code explanations and at the same time view the code.

Development sequence

Here is the recommended development sequence:

  1. Use the In-Page embed player implementation to test the functionality of your player, plugin and CSS (if CSS is needed)
  2. Put the plugin's JavaScript and CSS into separate files for local testing
  3. Deploy the plugin code and CSS to your server once you have worked out any errors
  4. Use Studio to add the plugin and CSS to your player
  5. Replace the In-Page embed player implementation if you determine that the iframe implementation is a better fit (detailed in next section)

For details about these steps, review the Step-by-Step: Plugin Development guide.

iframe or In-Page embed

When developing enhancements for the Brightcove player you will need to decide if the code is a best fit for the iframe or In-Page embed implementation. The best practice recommendation is to build a plugin for use with an iframe implementation. The advantages of using the iframe player are:

  • No collisions with existing JavaScript and/or CSS
  • Automatically responsive
  • The iframe eases use in social media apps (or whenever the video will need to "travel" into other apps)

Although integrating the In-Page embed player can be more complex, there are times when you will plan your code around that implementation. To generalize, this approach is best when the containing page needs to communicate to the player. Specifically, here are some examples:

  • Code in the containing page needs to listen for and act on player events
  • The player uses styles from the containing page
  • The iframe will cause app logic to fail, like a redirect from the containing page

Even if your final implementation does not use the iframe code, you can still use the In-Page embed code with a plugin for your JavaScript and a separate file for your CSS. This encapsulates your logic so that you can easily use it in multiple players.

API/Plugin resources used

API Methods API Events Brightcove Player Plugins
addClass() loadedmetadata Overlay Plugin
removeClass() timeupdate  

Player/HTML configuration

This section details any special configuration needed during player creation. In addition, other HTML elements that must be added to the page, beyond the in-page embed player implementation code, are described.

Player configuration

No special configuration is required for the Brightcove Player you create for this sample.

Other HTML

The Overlay Plugin's CSS and JavaScript files are included for proper use of the plugin. Also, to help clarify what the sample's JavaScript code is doing added HTML is added to display key values. Of course, in actual usage you would not display this information.

Application flow

The basic logic behind this application is:

  • Configure the overlay, then hide it initially.
  • Track if 5 seconds (or the time you specify) has passed, and when it has, display the overlay.
  • When the overlay has been displayed for 5 seconds (or the time you specify), and the text has not been clicked, pause the video.
  • When the button is clicked, or the viewer starts the video after pause, reinitialize values and start time tracking again.

Configure the overlay

Find the code which is labeled:

// +++ Configure the overlay +++

Configuration of Brightcove's Overlay Plugin. Note this is where the text that appears after set time is entered.

Track times

Find the code which is labeled:

// ### When playback position changes, show the overlay msg if greater than time check point ###

The timeupdate event is monitored to track how long the video has been playing since the last time check, and how long the message has been displayed.

Display click to continue button and countdown to pause

Find the code which is labeled:

// ### Display overlay message and start countdown to pause ###

JavaScript's setInterval method is used to track how long the click to continue button has been displayed, and when time is met, video is paused.

Restart tracking

Find the code which is labeled:

// ### Reset counters after click or pause ###

When the click to continue button is clicked, or the video is resumed after a pause, the variables used for tracking times are reset.

Application styling

The CSS is vital to the functioning of this sample, and has styles to do the following:

  • Hides the overlay using the display: none style. This style is programmatically added and removed.
  • Formats the click to continue text that is used as a button.
  • Sizes the player.

Plugin code

Normally when converting the JavaScript into a Brightcove Player plugin nominal changes are needed. One required change is to replace the standard use of the ready() method with the code that defines a plugin.

Here is the very commonly used start to JavaScript code that will work with the player:

videojs.getPlayer('myPlayerID').ready(function() {
  var myPlayer = this;

You will change the first line to use the standard syntax to start a Brightcove Player plugin:

videojs.registerPlugin('pluginName', function(options) {
  var myPlayer = this;

As mentioned earlier, you can see the plugin's JavaScript code in this document's corresponding GitHub repo: still-watching.js.

Using the plugin with a player

Once you have the plugin's CSS and JavaScript files stored in an Internet accessible location, you can use the plugin with a player. In Studio's PLAYERS module you can choose a player, then in the PLUGINS section add the URLs to the CSS and JavaScript files, and also add the Name and Options, if options are needed.