https://training-nyc.com/legacy/PowerPoint.png & http://a4.mzstatic.com/us/r30/Purple6/v4/46/9d/29/469d291a-18ce-a3a1-c5c9-cfefcc11ad7f/Keynote.png We can make videos within PowerPoint/Keynote and publish them, so no additional software is needed, but editing may be needed so a screencasting application like Camtasia can help.
http://pcclassesonline.com/wp-content/uploads/2013/12/imovie.png & http://moviemakingsoftwarereviews.com/wp-content/uploads/2013/07/Windows-Movie-Maker.jpg