Media Player Help Page for Video On Demand for Live Events

Basic usage

The player displays two videos - the presenter and the presentation - along with some control options on the lower menu bar. You can begin viewing the lecture by pressing the play button on top of the video window or in the control bar.

Basic usage player screen

Live usage

The player displays the live feed from the classroom. Live player menu contains a limited set of menu options. They include changing resolution, full screen mode, volumne control, and the help button.

Live usage player screen

Video navigation

You can navigate to any time in the video by clicking the timeline:

The timeline control

We also offer skip controls to help you navigate forward or backwards by set amounts - for instance, to skip back 10 seconds to hear something again that you may have missed.

The skip controls

You can use the slide tool to skip to a specific part of the video based on what content was being presented. Click the tool and then click a slide to jump to that section of the video.

The slide navigation control

Speeding up / slowing down playback

You can increase/decrease the playback speed via the playback speed control. Click it and you'll get a set of choices. Select "1x" to set playback speed back to normal.

The playback speed control

Change video resolution

If you are experiencing stuttering or jerky playback, the video stream may be more than your available bandwidth can handle. To resolve this, try lowering the resolution of the video stream. Click on the player's current resolution displayed in the control bar to see available options.

The change video streaming resolution button

Changing the layout of the player

You can switch between several layouts designed to emphasize the camera or the presentation, depending on the current focus of what's happening in the video. For instance, if the instructor is working on a problem you might want to see the projected chalkboard in as much detail as possible. Switching layouts lets you do this.

You switch layouts with "switch layout" tool:

The switch layout control

Viewing lectures in full screen mode

Use the "full screen" tool to maximize the size of the videos in your web browser. Press the escape key to exit, or simply click the control again.

The full screen control

Class handouts

A "Class Handout" link appears in the help menu if the publication contains an attached handout. Click the "Class Handout" link to access the handout. PDF files may open in another window instead of downloading.

The matterhorn handouts button


A closed caption icon (CC) appears on the control bar if the publication contains closed captions. Click closed caption icon to enable captions.

Turn on captions button

Click the icon again to close the popup text.

Turn on captions button

Click the icon and select "Off" to remove captions.

Turn on captions button

Student Public Timed Comments

This feature is new and in BETA stage. The "comments" button will appear on certain series for authenticated viewers. Click the button to view the comments interface and to view and post public comments at time points in the lecture. Students can view and reply to each other's comments. Feedback and comments are welcome!

Timed Comments view

The help menu

The "help" menu has links to give feedback about the player and to find all videos in this course.

The help menu

Keyboard shortcuts

Some basic functions of the player can be used with the keyboard.

  • ALT+CTRL+P: play-pause
  • ALT+CTRL+S: pause
  • SPACE: play-pause
  • ALT+CTRL+M: mute
  • UP: volume up
  • DOWN: volume down
  • ESCAPE: exit from fullscreen mode


This player is open source and based on the "Paella Engage Player" which is published by the Universitat Politecnica de Valencia under the GPL License 3.0. http://paellaengage.upv.es