Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for tracking presentation of content. In one aspect, a method includes segmenting a video into two or more segments. Each segment of the video can be a variably selected disjoint subset of the video. A client-side video player determines that playback of the video has reached the end of one of the segments. A presentation type for the video is determined, where the presentation type being one of an advertisement presentation or a non-advertisement presentation. The playback data is provided to a server-side data processing apparatus that stores the playback data in a data store. The playback data indicate the presentation type for the video and that playback of the video reached the end of the one of the segments.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for tracking presentation of content. In one aspect, a method includes segmenting a video into two or more segments. Each segment of the video can be a variably selected disjoint subset of the video. A client-side video player determines that playback of the video has reached the end of one of the segments. A presentation type for the video is determined, where the presentation type being one of an advertisement presentation or a non-advertisement presentation. The playback data is provided to a server-side data processing apparatus that stores the playback data in a data store. The playback data indicate the presentation type for the video and that playback of the video reached the end of the one of the segments.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, including a method for charging advertisers for advertisements. The method comprises providing a video advertisement to a user in a content page where the video advertisement includes a control for selecting an associated video for playback. The method further comprises receiving, from the user, a selection of the control. The method further comprises determining when the user is presented with the video. The method further comprises charging an advertiser associated with the video advertisement based on the determining as opposed to a time when the selection occurs.