You can add a video from your computer to a page.
Click the Video button on the toolbar.

You will see the video dialog.

Click the My Files button.

Locate the file you want to add and click the Open button.
The video will be added to the page.

You will see the video dialog.

Click the My Files button.

Locate the file you want to add and click the Open button.
The video will be added to the page.
To preview the video while you are editing, select the video and click the Play button the options panel.

The video will also have a play button on it when you click the Show button to present your project.
If you want the video to play automatically when you present, turn the Auto play slider to the on position.
