We disclose a technology implemented on a computer that automates sequential display of messages, typically videos, which appear on a user's display screen in the same place or in overlapping areas of a single window in a browser. In particular, this relates to displaying a message that arbitrarily may be in a different format than a requested video, with the first message programmed to appear before or after the requested video in substantially the same area of the user's display screen where the requested video will appear or has appeared. The message and the requested video are sequenced without any need to match formats or players used.