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.
What was measured
Caption quality
Accurate, well-timed captions with appropriate, on-trend styling.
decisive for this rankingtransformation
Accurate, well-timed captions are part of the finished ad and affect clarity and performance on social platforms. (3 of 3 judges)
What was given, what came back
Test input: Duolingo – Mobile App · mixed · group: ugc-style-video-ads
Input — what we sent
Input, verbatim
Product URL: https://www.duolingo.com/ Exact script: Hook: Learning a new language has never been this easy. Script: 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. Output requirements: - Vertical (9:16) - 20–30 seconds - UGC-style AI presenter - Natural AI voice - Captions enabled
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.
Why this input is hard
- · Mobile app understanding
- · Consumer app promotion
- · Script quality
- · Avatar realism
- · Voice quality
- · Caption quality
- · Overall ad readiness
Output — unretouched
Also checked on this input — same tool, 4 other criteria
Avatar realism✓ WorkedGenerates a strong-looking photorealistic avatar with no visible artifacts; the report says the face, hair, and teeth look natural even in a wide smile.B-roll / product integration✗ FailedThe tool can produce a single static shot with no cutaways and no product visuals, so the app never gets any supporting footage.Platform formats◐ MixedThe export format is correct at full-bleed vertical 9:16 (1080×1920), but the clip is only 13.5 seconds long, below the requested 20–30 second range.Product understanding✗ FailedFor an app prompt, the tool can leave out the app completely and produce only an avatar talking to camera, with no screenshot, graphic, or in-video product reference.
Provenance
- Observation
- e12d44db-bb16-4a23-be8b-d93b69e44efc
- Evidence run
- 9fdbb84b-4aa0-484d-8f89-5c46608019a5
- Study
- Generate UGC-Style Video Ads With AI Avatars
- Research task
- 86baxegpg
- Tested at
- not recorded
- Source
- first-party
- Evidence state
- verified
- Proof shown
- input + output shown
- Cost / latency
- not captured
- Repeat run
- not captured
- Tester
- not captured
The last three rows are honest blanks, not placeholders — our capture has no field for them yet.
Query this
get_evidence({
tool: "joggai",
scenario: "ugc-style-video-ads"
})MCP · mcp.aidemos.com/api/mcp
Free with attribution.
Same input, same check — 3 other tools
measured on Caption quality
HeyGen◐ MixedCaptions 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.Invideo AI◐ MixedThe 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.Topview AI✓ WorkedCaptions were generated and readable.
This evidence is published in
Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com