{"observation":{"id":"9e6ab621-70d9-44c8-bb66-97dfd8502194","tool":"kapwing","tool_name":"Kapwing","criterion":"motion-handling","criterion_name":"Motion handling","criterion_definition":"Does quality degrade when the subject moves quickly, gestures, or leans?","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"A video-background tool has to keep working when the subject moves; failure here means the core effect breaks down. (3 of 3 judges)","scenario":"busy-urban-street","scenario_name":"Busy Urban Street","group_tag":"remove-or-replace-video-backgrounds-using-ai","scenario_description":"A video of a person walking through a busy city street with multiple people, moving vehicles, and a visually complex urban background. 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movement"]},"tool_page_slug":"kapwing","tool_url":"https://aidemos.com/tools/kapwing","permalink":"https://aidemos.com/evidence/9e6ab621-70d9-44c8-bb66-97dfd8502194","api_url":"https://ai.aidemos.com/v1/observations/9e6ab621-70d9-44c8-bb66-97dfd8502194"},"peers":[{"id":"3fdb7ce8-2f77-457f-83c9-ae067f7d42d6","tool":"bria-ai","tool_name":"Bria.ai","verdict":"worked","score":null,"score_total":null,"note":"Both pedestrians remained separately isolated while walking, so multi-subject motion did not cause subject loss.","artifact_count":4,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/1778c904fac34eb5a5ff16bb86c923f3.mp4?v=1","evidence_url":"https://aidemos.com/evidence/3fdb7ce8-2f77-457f-83c9-ae067f7d42d6"},{"id":"34a2cdbc-b9d3-4de7-9da0-109ebb7e07fd","tool":"cutout-pro","tool_name":"Cutout.Pro","verdict":"worked","score":null,"score_total":null,"note":"Keeps a moving foreground pedestrian isolated while the background stays removed, and even a second person can appear as a 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anyone.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/d27ac7ac52bd48e4be9f37de63fe5b5b.mp4?v=1","evidence_url":"https://aidemos.com/evidence/8e59fc53-0d63-4ab8-98f2-55c7f4a84354"},{"id":"5f180402-d5a5-4872-adad-33942d1ff44d","tool":"invideo-ai","tool_name":"InVideo AI","verdict":"worked","score":null,"score_total":null,"note":"It kept the subject and secondary pedestrians consistent through a full ~20-second continuous walking shot, with no ghosting or motion breakdown.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/2a8f5912d1244f47b145c185e08cba33.mp4?v=1","evidence_url":"https://aidemos.com/evidence/5f180402-d5a5-4872-adad-33942d1ff44d"},{"id":"029b8c65-f8b1-4fcb-9b41-609b00c5f50d","tool":"media-io","tool_name":"Media.io","verdict":"worked","score":null,"score_total":null,"note":"The cutout held up as several people shifted position through the frame, including one person moving from center toward the right and others entering 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20-second white-background result and matches the input duration/frame count exactly.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/7d430cbf-8489-4aca-a152-7480a37e9abc"}],"appears_in":[{"page_type":"ranking","slug":"video-background-removers","title":"Best AI Tools to Remove or Replace Video Backgrounds with AI","url":"https://aidemos.com/best/video-background-removers","binding":"run"}],"same_scenario":[{"id":"3fdb7ce8-2f77-457f-83c9-ae067f7d42d6","tool":"bria-ai","tool_name":"Bria.ai","verdict":"worked","score":null,"score_total":null,"note":"Both pedestrians remained separately isolated while walking, so multi-subject motion did not cause subject loss."},{"id":"34a2cdbc-b9d3-4de7-9da0-109ebb7e07fd","tool":"cutout-pro","tool_name":"Cutout.Pro","verdict":"worked","score":null,"score_total":null,"note":"Keeps a moving foreground pedestrian isolated while the background stays removed, and even a second person can appear as a separate cutout in one 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breakdown."},{"id":"029b8c65-f8b1-4fcb-9b41-609b00c5f50d","tool":"media-io","tool_name":"Media.io","verdict":"worked","score":null,"score_total":null,"note":"The cutout held up as several people shifted position through the frame, including one person moving from center toward the right and others entering at the edges."},{"id":"a7e199a2-b296-416a-aed7-56347e28116f","tool":"picsart","tool_name":"Picsart","verdict":"failed","score":null,"score_total":null,"note":"In a two-person moving street clip, the primary walker stayed isolated but the second pedestrian was erased entirely, indicating a single-subject lock-on in dynamic scenes."}]}