Abstract: Techniques for measuring the visibility of video content are presented. The video content, such as a video advertisement, may be played or presented by a video player, for example as part of a web page. Initialization code may be incorporated within a video player. The initialization code may examine metadata associated with video content to determine whether to measure visibility information associated with the video content. If a measurement flag is encountered in the metadata, the initialization code may initialize measurement code designed to measure visibility information associated with the video content. The measurement code may execute to measure visibility information associated with the video content and transmit the visibility information to a measurement server.

Abstract: Methods, systems, and computer-readable media for determining the visibility of downloaded objects, such as electronic advertisements, on a client device screen comprise consulting one or more draw-count properties associated with the advertisement, such as screen-draw-count, window-draw-count, or document-draw-count properties; and determining whether the advertisement was likely visible based on the one or more draw-count properties. A plurality of objects, such as transparent pixel images may also be placed on or around the advertisement and their draw-counts compared. If only some of the transparent pixel images have non-zero draw-counts, then it may be inferred that only a portion of the advertisement was visible on the client device screen.