This question refers to a video that is saved on your computer, not a YouTube or online video.
In the Visual Aid builder, click the "+Add Visual" bar.
In the pop up, click Video, and click continue.
Give the video a name. This name will be what is displayed on your controls during your presentation.
Click "Choose File" and locate the image file on your device. Acceptable video files are .mp4, and .mov.
On the next page you can preview the video, scroll down and adjust the start and stop times (in seconds). If you want to show the entire video, your start time will be zero and your end time will be the number of seconds into your video you want to stop at. [End time in seconds = (minute x 60) + seconds. Example: 2:25 would be: (2 x 60) + 25 = 145 seconds.)
Preview the video
Then click Add
You can preview your file by clicking on the button labeled with your video name. To move the visual aid or delete it, click the three dots next to the title.