Abstract: An engagement time computer system for serving online content based on user engagement duration includes an output device, at least one memory, and one or more processors. The processors are configured to determine a historical engagement time of an online user and to identify a plurality of online content items. Each online content item of the plurality of online content items has a target engagement time. The processors are further configured to receive a request for a content item. The request is associated with the online user. The processors are also configured to select a first online content item from the plurality of online content items based at least in part on the historical engagement time of the online user and the target engagement time of the first online content item and to transmit the first online content item for display to the online user.

Abstract: Systems, methods, and apparatus include computer programs encoded on a computer-readable storage medium, including a system for ranking videos. Videos are identified that have been presented at client devices. For each video, session start data is identified that specifies a lead video that initiated presentation to a user during a presentation session. For each lead video, presentation times over multiple user sessions are determined, a scaled presentation time is obtained, user sessions for which the lead video initiated presentation of videos are identified, and an aggregate video presentation time attributable to the lead video is determined. For each given video, a presentation score is determined based on a scaled presentation time of the lead video relative to a sum of the aggregate video presentation times for the lead videos. The videos are ranked based on the presentation scores. A user interface is updated to present the ranked videos.

Abstract: Methods, systems, and media for indicating viewership of a video are provided. In some embodiments, the method comprises: identifying a video; identifying a first group of users; determining an affinity score for each user with the identified video; receiving a request to present a page that includes a representation of the video; identifying a second group of users connected to the first user associated with the user device; determining a viewership status of each user in the second group of users corresponding to the video; identifying a subset of users in the second group of users based at least in part on the viewership status; and causing groups of indicators to be presented on the user device, wherein each indicator in the groups of indicators represents the viewership status of the user, and wherein the indicators are presented on the requested page in connection with the representation of the video.

Abstract: Systems, methods, and apparatus include computer programs encoded on a computer-readable storage medium, including a system for ranking videos. Videos are identified that have been presented at client devices. For each video, session start data is identified that specifies a lead video that initiated presentation to a user during a presentation session. For each lead video, presentation times over multiple user sessions are determined, a scaled presentation time is obtained, user sessions for which the lead video initiated presentation of videos are identified, and an aggregate video presentation time attributable to the lead video is determined. For each given video, a presentation score is determined based on a scaled presentation time of the lead video relative to a sum of the aggregate video presentation times for the lead videos. The videos are ranked based on the presentation scores. A user interface is updated to present the ranked videos.

Abstract: A notifiable event pertaining to a series of videos may be detected, wherein detecting the notifiable event comprises searching a log pertaining to the series of videos. A user who has watched a portion of at least one video in the series of videos or at least one video in the series of videos may be determined, wherein the user is assigned an affinity score indicating a user interest to continue viewing the series of videos. A notification identifying the notifiable event pertaining to the series of videos may be generated, the notification comprising a reference to an unwatched next video in the series of videos. The notification may be transmitted to the user.

Abstract: Implementations relate to continuation of playback of media content by different devices. In some implementations, a method includes causing a stream of media content data to be received from a stream source and output by a first device to a user, where a portion of the data is buffered on the first device before output. An indication is detected that the user has stopped using the first device for output of the content data. A place marker indicates a portion of the content that is output approximately at the time of the indication. The method causes the stream of content data to be received and output by a second device starting at the place marker portion. The buffered content data is sent from the first device to the second device for output by the second device before unbuffered portions of the content data received from the stream source.

Abstract: Implementations relate to continuation of playback of media content by different devices. In some implementations, a method includes causing a stream of media content data to be received from a stream source and output by a first device to a user, where a portion of the data is buffered on the first device before output. An indication is detected that the user has stopped using the first device for output of the content data. A place marker indicates a portion of the content that is output approximately at the time of the indication. The method causes the stream of content data to be received and output by a second device starting at the place marker portion. The buffered content data is sent from the first device to the second device for output by the second device before unbuffered portions of the content data received from the stream source.

Abstract: A method for identifying insertion points for inserting live content into a continuous content stream is disclosed. The method includes identifying a first particular live content item included in a continuous content stream. The method determines a first live content item for presentation based on one or more interesting portions of the first live content item, wherein the one or more interesting portions are identified based one or more selection criteria, and wherein a first interesting portion comprises a start time. The method further causes the first live content item to be presented by the client device at the start time of the first interesting portion during playback of the first particular item.

Abstract: Methods, systems, and media for selecting content to be presented are provided. In some embodiments, the methods comprise: receiving a request for a first video content item from a user device; receiving an indication that the user device is in a background playback mode; determining that the first video content item is not suitable for presentation in the background playback mode based on one or more properties of audio data; based on the determining that the first video content item is not suitable for presentation in the background playback mode, selecting a second video content item that is suitable for presentation in the background playback mode based on the one or more properties of the audio data of the second video content item; and in response to selecting the second video content item, causing the second video content item to be presented by the user device.

Abstract: Methods, systems, and media for indicating viewership of a video are provided. In some embodiments, the method comprises: identifying a video; identifying a first group of users; determining an affinity score for each user with the identified video; receiving a request to present a page that includes a representation of the video; identifying a second group of users connected to the first user associated with the user device; determining a viewership status of each user in the second group of users corresponding to the video; identifying a subset of users in the second group of users based at least in part on the viewership status; and causing groups of indicators to be presented on the user device, wherein each indicator in the groups of indicators represents the viewership status of the user, and wherein the indicators are presented on the requested page in connection with the representation of the video.

Abstract: A method for providing a cross-application content player is disclosed. The method includes receiving, during playback of a content item in a first content player within a first user interface of a first mobile application, an indication of a user request pertaining to a second mobile application, wherein the first mobile application is associated with a first platform, and the second mobile application is associated with a second platform. The method further includes identifying a play state of the content item corresponding to the user request, and causing playback of the content item in a second content player within a second user interface of the second mobile application based on the play state.

Abstract: Methods, systems, and media for identifying video objects linked to a source video are provided. In some embodiments, the method comprises: identifying demographic attributes corresponding to a first user participating in an online conversation; determining at least one keyword associated with the online conversation, wherein the keyword indicates a topic of the online conversation; identifying a video object based at least on the demographic attributes and the at least one keyword, wherein the video object comprises a portion of a video; causing the identified video object to be presented in a group of video objects on a first user device associated with the first user; receiving an indication that the identified video object has been selected on the first user device for inclusion in a message in the online conversation; and causing the identified video object to be presented on a second user device associated with the second user.

Abstract: A method for providing personalized content sharing is disclosed.

Abstract: Methods, systems, and media for presenting interactive elements within video content are provided.

Abstract: Systems, methods, and apparatus include computer programs encoded on a computer-readable storage medium, including a system for ranking videos. Videos are identified that have been presented at client devices. For each video, session start data is identified that specifies a lead video that initiated presentation to a user during a presentation session. For each lead video, presentation times over multiple user sessions are determined, a scaled presentation time is obtained, user sessions for which the lead video initiated presentation of videos are identified, and an aggregate video presentation time attributable to the lead video is determined. For each given video, a presentation score is determined based on a scaled presentation time of the lead video relative to a sum of the aggregate video presentation times for the lead videos. The videos are ranked based on the presentation scores. A user interface is updated to present the ranked videos.

Abstract: A method for identifying insertion points for inserting live content into a continuous content stream is disclosed. The method includes identifying a live content item to include in a continuous content stream, and identifying an interesting portion of the live content stream, the interesting portion corresponding to a time duration. The method further includes computing an estimated end time of a first content item included in the continuous content stream, and scheduling the live content item to be included in the continuous content stream as a next content item to be presented after the first content item in response to a determination that the estimated end time of the first content item occurs within the time duration.

Abstract: Methods, systems, and media for selecting content to be presented are provided. In some embodiments, the methods comprise: receiving a request for a first video content item from a user device; receiving an indication that the user device is in a background playback mode; determining that the first video content item is not suitable for presentation in the background playback mode based on one or more properties of audio data; based on the determining that the first video content item is not suitable for presentation in the background playback mode, selecting a second video content item that is suitable for presentation in the background playback mode based on the one or more properties of the audio data of the second video content item; and in response to selecting the second video content item, causing the second video content item to be presented by the user device.

Abstract: Methods, systems, and media for indicating viewership of a video are provided. In some embodiments, the method comprises: identifying a video; identifying a first group of users; determining an affinity score for each user with the identified video; receiving a request to present a page that includes a representation of the video; identifying a second group of users connected to the first user associated with the user device; determining a viewership status of each user in the second group of users corresponding to the video; identifying a subset of users in the second group of users based at least in part on the viewership status; and causing groups of indicators to be presented on the user device, wherein each indicator in the groups of indicators represents the viewership status of the user, and wherein the indicators are presented on the requested page in connection with the representation of the video.

Abstract: Methods, systems, and media for presenting interactive elements within video content are provided.

Abstract: Systems, methods, and apparatus include computer programs encoded on a computer-readable storage medium, including a system for ranking videos. Videos are identified that have been presented at client devices. For each video, session start data is identified that specifies a lead video that initiated presentation to a user during a presentation session. For each lead video, presentation times over multiple user sessions are determined, a scaled presentation time is obtained, user sessions for which the lead video initiated presentation of videos are identified, and an aggregate video presentation time attributable to the lead video is determined. For each given video, a presentation score is determined based on a scaled presentation time of the lead video relative to a sum of the aggregate video presentation times for the lead videos. The videos are ranked based on the presentation scores. A user interface is updated to present the ranked videos.