Abstract: Systems and methods for obtaining and playing video advertisements in conjunction with play of video content use information about the viewability of an instantiation of a video player software application. An instantiation of the video player software application generates a viewability score which is intended to reflect a degree of confidence that the instantiation of the video player software application is located on a part of a webpage that currently appears on a user's display screen. The instantiation of the video player software application provides the viewability score to video providers when sending bid request to the video providers. The video providers then use the viewability score to help decide what to bid to have the instantiation of the video player software application play a particular video.

Abstract: Systems and methods for obtaining and playing video advertisements in conjunction with play of video content use information about the viewability of an instantiation of a video player software application. An instantiation of the video player software application generates a viewability score which is intended to reflect a degree of confidence that the instantiation of the video player software application is located on a part of a webpage that currently appears on a user's display screen. Information used to generate the viewability score can be gathered during play of a video. The information used to generate a viewability score can include information about user performed actions and information that indicates the degree to which the user is engaged by a video.