Abstract: A method for verifying video statistics of a content hosting platform includes enrolling, by a measurement service, a client device as a panel client device to provide panel reports independent of the content hosting platform, and sending a panel sniffer module to the panel client device. The panel sniffer module to cause the panel client device to send panel reports to the measurement service, and the panel reports include first video statistics of playback of a video by a player executing on the panel client device. The method also includes receiving a panel report from the panel client device and receiving a measurement report from the content hosting platform. The measurement report is generated by the content hosting platform and includes second video statistics of the playback. The method also includes verifying accuracy of the second video statistics by comparing the first video statistics to the second video statistics.

Abstract: A method for verifying video statistics of a content hosting platform includes enrolling, by a measurement service, a client device as a panel client device to provide panel reports independent of the content hosting platform, and sending a panel sniffer module to the panel client device. The panel sniffer module to cause the panel client device to send panel reports to the measurement service, and the panel reports include first video statistics of playback of a video by a player executing on the panel client device. The method also includes receiving a panel report from the panel client device and receiving a measurement report from the content hosting platform. The measurement report is generated by the content hosting platform and includes second video statistics of the playback. The method also includes verifying accuracy of the second video statistics by comparing the first video statistics to the second video statistics.

Abstract: A census server provides measurement reports describing clients accessing a specified network-based service to a measurement agency via a network. The census server receives census events from clients used by users via the network. The census events describe usage of a network-based service by the clients. The census server processes the census events to produce measurement reports describing the usage of the network-based service. The processing includes filtering specified information out of the census events to prevent the measurement reports from identifying the users of the clients. The measurement agency may use the measurement reports, for example, to describe how the clients tend to access and use the service.