12

return movieLists.map(genres => 
  genres.videos.map(video => 
    video.boxarts.filter(boxart =>
      boxart.width === 150 && boxart.height === 200
        ).map(boxart => {
          return ({
          id: video.id,
          title: video.title,
          boxart: boxart.url
          })
        })
  ).concatAll()
).concatAll()