Start with the good bit
Lead with the point worth sharing. The lead-in gets trimmed, and just enough context stays for the clip to make sense to a stranger.
Turn a long video into short vertical clips
Give the good bit a video of its own.
Turn a longer recording into something people can follow in a feed. Bring the point forward, frame it for a phone and add captions for viewers watching on mute.
videoFn is a Mac video editor that Claude or ChatGPT can drive. Describe the video, watch it come together in the preview and give notes. If you'd rather fix something yourself, the editor is right there.
make a vertical 8 second clip with captions and a progress bar
framing the walk-on footage at 1080 by 1920
captioning the narration with karaoke highlights
landing each step on its spoken word
adding a full-video progress bar
Portrait export, 1080 by 1920. Supplied walk-on footage with generated narration and captions.
Make the short version stand on its own.
Make it work on a phone
The agent reframes for vertical and times captions to the voice, then checks the text and framing so nothing important ends up behind the like button.
Try another opening
Preview the clip and ask for a different hook or pace, or adjust it in the editor, then export the size you need.
Also: tidy up your recording, animated text, product demo video and everything else.
Free to make videos. €13.99 to lose the watermark.
Make the short version worth watching.