sentence: An introduction comes onto the screen for a video that will show a demo of some janitorial products. sentence:  A man on the screen begins to describe a mop and bucket set that are used for cleaning floors. sentence:  He then begins to demonstrate how to use the mop and bucket set. sentence:  Next he shows the buckets close up and begins to describe how to use the buckets. sentence:  At the end of the video the closing credits are shown.