{"observation":{"id":"563c5021-098b-4a1f-b449-465d7e93d46c","tool":"heygen","tool_name":"HeyGen","criterion":"caption-quality","criterion_name":"Caption quality","criterion_definition":"Accurate, well-timed captions with appropriate, on-trend styling.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"Accurate, well-timed captions are part of the finished ad and affect clarity and performance on social platforms. (3 of 3 judges)","scenario":"duolingo-mobile-app","scenario_name":"Duolingo – Mobile App","group_tag":"ugc-style-video-ads","scenario_description":"A short-form UGC promo prompt for a consumer mobile app, designed to test whether the tool can explain app benefits simply and persuasively while generating a realistic AI-presenter video.","modality":"mixed","input_text":"Product URL: https://www.duolingo.com/\n\nExact script:\nHook: Learning a new language has never been this easy.\nScript: I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try.\n\nOutput requirements:\n- Vertical (9:16)\n- 20–30 seconds\n- UGC-style AI presenter\n- Natural AI voice\n- Captions enabled","input_artifact_refs":[],"stresses":["Mobile app understanding","Consumer app promotion","Script quality","Avatar realism","Voice quality","Caption quality","Overall ad readiness"],"verdict":"mixed","score":null,"score_total":null,"note":"Captions are present, but around 0:04-0:05 they overlap with a leftover badge graphic and become garbled, creating hard-to-read double-exposed text.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://cdn.futuresmart.ai/public/aidemos/b1c9519dde064a1384d3dbe89454fb49.png?v=1","role":"context","alt":null},{"url":"https://cdn.futuresmart.ai/public/aidemos/e1595503067242cdbfafa0a9676f1a5a.mp4?v=1","role":"output","alt":null}],"run_id":"9fdbb84b-4aa0-484d-8f89-5c46608019a5","study_title":"Generate UGC-Style Video Ads With AI Avatars","study_kind":"generation","research_task":"86baxegpg","tested_at":null,"completeness":"input-and-output","input":{"state":"text","text":"Product URL: https://www.duolingo.com/\n\nExact script:\nHook: Learning a new language has never been this easy.\nScript: I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try.\n\nOutput requirements:\n- Vertical (9:16)\n- 20–30 seconds\n- UGC-style AI presenter\n- Natural AI voice\n- Captions enabled","files":[],"modality":"mixed","stresses":["Mobile app understanding","Consumer app promotion","Script quality","Avatar realism","Voice quality","Caption quality","Overall ad readiness"]},"tool_page_slug":"heygen","tool_url":"https://aidemos.com/tools/heygen","permalink":"https://aidemos.com/evidence/563c5021-098b-4a1f-b449-465d7e93d46c","api_url":"https://ai.aidemos.com/v1/observations/563c5021-098b-4a1f-b449-465d7e93d46c"},"peers":[{"id":"4db20ba1-6e74-4050-9a0d-363b7b367453","tool":"invideo-ai","tool_name":"Invideo AI","verdict":"mixed","score":null,"score_total":null,"note":"The captions visibly advance across the clip and support the CTA line, but the report does not separately validate timing or styling beyond the sampled frame progression.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/2d708f66a6554c76aa83c81aa49797c7.mp4?v=1","evidence_url":"https://aidemos.com/evidence/4db20ba1-6e74-4050-9a0d-363b7b367453"},{"id":"e12d44db-bb16-4a23-be8b-d93b69e44efc","tool":"joggai","tool_name":"JoggAI","verdict":"failed","score":null,"score_total":null,"note":"The tool can export a clip with zero on-screen captions for the full 13.5 seconds, so subtitles are absent even on a mobile-app promo.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/7091a0095a044c99ac097c9e36090b10.png?v=1","evidence_url":"https://aidemos.com/evidence/e12d44db-bb16-4a23-be8b-d93b69e44efc"},{"id":"89287467-a094-457a-bb5c-bccb2ec831e4","tool":"topview-ai","tool_name":"Topview AI","verdict":"worked","score":null,"score_total":null,"note":"Captions were generated and readable.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/804557dc8e114b7b881b3057d7014c4f.mp4?v=1","evidence_url":"https://aidemos.com/evidence/89287467-a094-457a-bb5c-bccb2ec831e4"}],"other_criteria":[{"id":"9012a876-7dac-4276-89c3-aa9dc9ebcf9d","criterion":"avatar-realism","criterion_name":"Avatar realism","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo output reads as a casual creator-style presenter rather than an AI-obvious stock avatar, with the report calling the setting genuinely UGC-authentic.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/9012a876-7dac-4276-89c3-aa9dc9ebcf9d"},{"id":"1dd03c75-de2c-4a5b-99da-30920f49b10d","criterion":"b-roll-product-integration","criterion_name":"B-roll / product integration","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"The supporting footage is not product-integrated because the cutaway uses the wrong app entirely, so the B-roll does not match the Duolingo testimonial being spoken.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/1dd03c75-de2c-4a5b-99da-30920f49b10d"},{"id":"7e43c5e4-07e8-4b3b-8141-9f792f225667","criterion":"platform-formats","criterion_name":"Platform formats","rank_role":"context","verdict":"worked","score":null,"score_total":null,"note":"This is the only run that delivers the requested full-bleed vertical 9:16 frame with no letterboxing.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/7e43c5e4-07e8-4b3b-8141-9f792f225667"},{"id":"8c0a2025-1a9c-4901-bf4c-6a1dc599c348","criterion":"product-understanding","criterion_name":"Product understanding","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"Product understanding breaks in the B-roll cutaway: the phone screen shows a shopping app ('NEW YORK BAG $219, ADD TO CART') instead of Duolingo or any language-learning interface.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/8c0a2025-1a9c-4901-bf4c-6a1dc599c348"},{"id":"64e1c84b-48cc-4206-a23d-413108d746c3","criterion":"script-quality-persuasiveness","criterion_name":"Script quality & persuasiveness","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The script is delivered verbatim from start to finish and lands on a natural CTA, ending correctly on 'give Duolingo a try.'","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/64e1c84b-48cc-4206-a23d-413108d746c3"}],"appears_in":[{"page_type":"ranking","slug":"ugc-video-ad-generators","title":"Best AI Tools for Generating UGC-Style Video Ads With AI Avatars","url":"https://aidemos.com/best/ugc-video-ad-generators","binding":"run"}],"same_scenario":[{"id":"4db20ba1-6e74-4050-9a0d-363b7b367453","tool":"invideo-ai","tool_name":"Invideo AI","verdict":"mixed","score":null,"score_total":null,"note":"The captions visibly advance across the clip and support the CTA line, but the report does not separately validate timing or styling beyond the sampled frame progression."},{"id":"e12d44db-bb16-4a23-be8b-d93b69e44efc","tool":"joggai","tool_name":"JoggAI","verdict":"failed","score":null,"score_total":null,"note":"The tool can export a clip with zero on-screen captions for the full 13.5 seconds, so subtitles are absent even on a mobile-app promo."},{"id":"89287467-a094-457a-bb5c-bccb2ec831e4","tool":"topview-ai","tool_name":"Topview AI","verdict":"worked","score":null,"score_total":null,"note":"Captions were generated and readable."}]}