Wikipedia
Slidecasting
A slidecast is an audio podcast that is combined with a slideshow or diaporama presentation. It is similar to a video podcast in that it combines dynamically-generated imagery with audio synchronization, but it is different in that it uses presentation software, such as PowerPoint, to create the imagery and the sequence of display separately from the time of the audio podcast's original recording.
Slidecasting may be useful for the display of relevant photographs or text, and are an alternative to camera video recordings.
An alternative definition of the slidecast is the online distribution and syndication of video recordings of live slideshow presentations and accompanying narrations.