Microsoft PowerPoint is often used in creating animated presentations for illustrating various projects using graphics and multimedia objects. In order to make sure these files are easily accessible on other computers, users often export them to other formats.
One could convert PPT to image formats, but this will result in loss of multimedia components, whereas exporting PowerPoint to videos will preserve all its features.
Some PPT to video converters will even enable users to add audio tracks or to change the order of the PPT slides.
Needless to say, one will be able to choose the target video format that suits their necessities.