For a short you already posted. Send the video plus a screenshot of its retention graph (or your average % viewed) and get the curve redrawn with the drop-offs marked, the frame on screen at each drop, every leak ranked, a cut list with the new target length, and a verdict printed next to its threshold.
Your opening is leaking viewers. Get a band-by-band diagnosis of the full first 30 seconds — plus 5 rewritten hooks you can film word-for-word. English & 中文. 你的视频开头正在流失观众。逐段诊断完整前 30 秒，再送你 5 条可以逐字照着拍的改写开头。支持英文与中文。
Send your short video and get its first six seconds read frame by frame: what is on screen and heard each second, where the picture freezes or the sound drops, a risk level per second with the reason, and three replacement openings to film. One report image plus the findings, for TikTok, Reels and YouTube Shorts.
Upload your finished Short, Reel, or TikTok. Get timestamped checks and fixes for captions, on-screen text, and visual mistakes before you publish.
Upload a video and HookScan measures its first 8 seconds: when the first word is spoken, when the picture first changes, cuts, movement, on-screen text, faces, loudness and silences. Each check is PASS or FIX with the change in seconds. You also get two re-cut videos: trimmed_open.mp4 with the silent start and long pauses removed, and cold_open.mp4 that opens on your strongest line. No retention guesses, only measured numbers. A 10-minute 1080p file took about 3 minutes in our test.
Send your podcast, interview, stream or talk and get finished vertical clips back: the moments that stand alone, cut to 9:16 with word-by-word captions, framing that follows the speaker, level sound, and a title, hook and post caption for each. No transcript needed. Upload the video or paste a direct link to the file.
Diagnose why the first 6 seconds of your short-form video loses viewers — get a second-by-second evidence timeline, up to 3 named findings, 3 structurally different replacement hooks, and a timecoded edit table you can cut today.
Turn one long speech-led video into a tighter finished MP4 at your target length — without cutting away the context that makes it make sense.
Diagnose what is really limiting your YouTube growth using your own channel data — then get clear next-video ideas, titles, thumbnail concepts, and a 7-day action plan.