A very simple way to make a video is to create a series of slides in PowerPoint and then save your work as a movie. The example below was made using the PowerPoint technique.
The Basic Process
Create your slides in PowerPoint. Google Slides won’t work.
Add Transitions between your slides and set them to advance automatically (not by clicking).
Insert Audio to add royalty-free or free-to-use background music or your own narration.
Drag the Audio icon off the slide.
Use the Audio Tools -> Playback option to make the recording “play across slides,” and edit any other settings you’d like.
Save the slide show as a movie. The technique you use depends upon your version of PowerPoint.