In-stream – This creative appears inside a video player before, during, or after video content.
Out-stream – This creative appears outside a video player — typically in articles, social feeds, between levels of a game, or perhaps other context.
Overlay – This creative appears in front of the video content as it plays.
Redirect – This creative is a third‑party hosted ad that contains one or more video ads.
This question is a part of the Check your Knowledge section of the “Getting Video Ads up and Running in Google Ad Manager” lesson from the “Fundamentals of Video” unit which is part of the Drive Advertising Revenue with Google Ad Manager course.