Your 5-second walk-and-flip footage, slowed and replayed — with hook captions, a title card, a Honey voiceover, and the Human Brain App logo. No invented footage.
One file — the full 15-second ad (TikTok-ready)
Renders in real time (~15s): 1080×1920 vertical, your clip cover-cropped, captions and cards baked in, Honey voiceover as the audio track, real logo endcard. Runs in your browser.
Guaranteed TikTok-ready MP4 (one command)
No-fibs: the in-browser render can't be guaranteed TikTok-valid — TikTok is picky about the exact MP4 container, and some browsers only record WebM. The bulletproof path is this free ffmpeg command run locally with the assets above. Honest trade-off: it reproduces the same cut — slow-mo entrance, slow-mo replay, logo endcard, voiceover — but without the text cards, which only exist in the browser render. No ffmpeg? Use CapCut: import your clip twice (second pass trimmed to the last ~2s, both at 0.75x speed), add the voiceover as sound, add the text cards by hand, end on the logo.
ffmpeg -i clip.mov -i clip.mov -loop 1 -framerate 30 -t 2.2 -i logo.jpeg -i voiceover.mp3 \ -filter_complex "[0:v]setpts=1.33*PTS,scale=1080:1920:force_original_aspect_ratio=increase,crop=1080:1920,setsar=1,format=yuv420p[v0];[1:v]trim=3:5,setpts=1.43*PTS,scale=1080:1920:force_original_aspect_ratio=increase,crop=1080:1920,setsar=1,format=yuv420p[v1];[2:v]scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:color=black,format=yuv420p[v2];[v0][v1][v2]concat=n=3:v=1:a=0[v]" \ -map "[v]" -map 3:a -c:v libx264 -preset medium -crf 20 -pix_fmt yuv420p -c:a aac -b:a 128k -shortest -movflags +faststart entrance-ad-tiktok.mp4
No-fibs — what this ad is
The footage is your real, uploaded 5-second clip — not AI-generated, and nothing was invented on top of it: the only edits are a 0.75x slow-motion pass, one 0.7x slow-motion replay of the final ~2 seconds, canvas-drawn text cards, and the real Human Brain App logo endcard. The ad makes no claims about the person in the clip — the captions and voiceover ("focus, reaction time, memory") refer to the self-measured labs that actually ship in the Human Brain App, and the "15 seconds" is approximate: the timeline is the clip at 0.75x plus the replay at 0.7x plus a 3s title card plus a 2.2s endcard ≈ 14–15s depending on your clip's exact length. The voiceover is Honey TTS. The render runs entirely in your browser (canvas + MediaRecorder): it outputs MP4 (H.264/AAC) when your browser supports recording MP4 (recent Chrome / Safari desktop do); if your browser can only record WebM, the badge above says so. The voiceover only bakes in when the audio host allows cross-origin capture; if it can't, the file renders silent and the badge says so. The preview always plays with the voiceover regardless. If the in-browser MP4 is rejected by TikTok, the ffmpeg recipe above produces a guaranteed TikTok-valid 1080×1920 H.264/AAC faststart MP4 (without the text cards).