If you have your course lecture in PowerPoint (or planning to create), you can easily convert it to video.

 

If you have PowerPoint 2010 and later:

 

Record a narration

 

Under the Slide Show Tab, choose "Record Slideshow. This will launch the Presentation, and will record your narration through whatever is set as the default microphone on your computer (be sure to test that audio is being picked up by external mics).  Start your presentation normally, and it will record the entire session. Be aware that under the same "Record Slideshow" dropdown, you can record over individual slides if you make a mistake.

Save it as a Video

After recording the presentation, click File > Save as > Save as type. You will see an option called "Windows Media Video" or .wmv which will save your presentation as a video. Be sure to save your file as both a PowerPoint file and a windows media file, so you can go back and edit the PowerPoint later.

For more information visit this article.

 

If you have PowerPoint 2007 and lower version:

 

You can use the workaround of you don't have higher version of ppt (2010 and later). You need  'windows movie maker' for this ( most computers using Windows do have the program by default).

 

The following steps show how to convert a presentation into a movie. However, please note that any transitions or custom animations you have applied to your slides will not convert. You can add transitions between slides in Windows Movie Maker, but I would suggest reworking any slides in PowerPoint that were dependent upon animations.

  1. Using PowerPoint, open the presentation you would like to convert into a movie.
  2. Click the Office button and select Save As.

    The Save As dialog box appears.
  3. From the Save As dialog box, navigate to where you would like the presentation to be saved.
  4. From the Save as type drop-down menu, select JPEG File Interchange Format (*.jpg).

    A dialog box will appear asking whether or not you want to export every slide or only the current slide.
  5. Select Every Slide.

    A dialog box will appear alerting you that each slide in your presentation has been saved as a separate file in a folder by the same name as your presentation.
  6. Click OK  and Close PowerPoint.
  7. Open Windows Movie Maker.
  8. Choose File > Import Into Collections.

    The Import File dialog box appears.
  9. Navigate to the folder in which you saved each slide as a JPG image.
  10. Open the folder and press [Ctrl] [A] on your keyboard to select all of the images.
  11. Click Import.

    All of your slides will appear in the Collections area in the center of the screen.
  12. Press [Ctrl] [A] on your keyboard to select all of the slides and drag them down to the storyboard below.

    If you press the Play button on the preview panel to the right, you will notice that your presentation is now in movie form.
  13. From the Finish Movie category, select Save to my computer.

    The Save Movie Wizard appears.
  14. Give your movie a name and select where you would like to save it.
  15. Click Next a few times and then click Finish.

    Your movie is now ready.