Content-based video recommendation

A system, comprising:

• a data processing apparatus;
• and
• a memory storage apparatus in data communication with the data processing apparatus, the memory storage apparatus storing instructions executable by the data processing apparatus and that upon such execution cause the data processing apparatus to perform operations comprising:
• for each video in a set of videos:
• obtaining a set of images included in the video;
• for each respective image in the set of images, generating a respective first set of one or more keywords that describe visual content depicted by the respective image;
• and
• generating, based at least on the respective first sets of one or more keywords for at least some of the images, a second set of keywords that describe the video;
• assigning the videos in the set of videos to groups based on the second set of keywords generated for each video;
• receiving a request for a video recommendation based on a first video of the set of videos;
• and
• providing, as the video recommendation, data identifying a second video of the set of videos based on the second video being assigned to a same group as the first video.

A computer program product, encoded on one or more non-transitory computer storage media, comprising instructions that when executed by one or more computers cause the one or more computers to perform operations comprising:

• for each video in a set of videos:
• obtaining a set of images included in the video;
• for each respective image in the set of images, generating a respective first set of one or more keywords that describe visual content depicted by the respective image;
• and
• generating, based at least on the respective first sets of one or more keywords for at least some of the images, a second set of keywords that describe the video;
• assigning the videos in the set of videos to groups based on the second set of keywords generated for each video;
• receiving a request for a video recommendation based on a first video of the set of videos;
• and
• providing, as the video recommendation, data identifying a second video of the set of videos based on the second video being assigned to a same group as the first video.