Starts by explaining the “More” tag, which is used to put shorter ‘introduction text’ on the main blog page, which links to the full article. Most of this video covers uploading and placing images.
(Note: this does not cover the “Media” area of WordPress Admin, just placing them from within the Editor.)
You can click the “Full Screen” icon while the video is playing, to see a full screen view which is much easier to follow.