How to Create Vertical Social Clips from a Long Video in Descript

A single long podcast or talk is a goldmine of short clips. Descript lets you find the best moments in the transcript, reframe them to vertical, and add captions, all without re-editing from scratch. This guide walks through producing one share-ready vertical clip.

What you need

• A Descript project with a long horizontal (16:9) video
• A target platform in mind (TikTok, Reels, or Shorts, all 9:16)
• An eye for a strong 30 to 60 second moment

Step 1: Find a strong moment in the transcript

Skim the transcript for a self-contained idea, story, or hot take that works without setup. Highlight that passage. A good clip usually runs 20 to 60 seconds and ends on a punchy line.

Step 2: Make a new clip from the selection

With the passage selected, create a new composition or duplicate the project so your edits do not touch the main video. You now have a short timeline containing just that moment.

Step 3: Switch the aspect ratio to 9:16

Open the layout or scene settings and change the aspect ratio to 9:16 vertical. The horizontal footage now sits in a vertical frame, so you need to reposition it.

Step 4: Add big captions

Vertical social clips live and die by captions because most people watch with sound off. Add word-by-word captions, bump the font size up, and use a bold style with a background so text is legible on a phone.

Step 5: Export at 1080x1920

Export as MP4 at 1080 by 1920, which is the standard for vertical social. Keep the bitrate high so it survives the platform's re-compression. Upload natively to each platform for the best reach.

Result: a 42 second vertical clip with the speaker auto-tracked and bold captions, pulled from an hour-long episode in roughly ten minutes, ready to post to three platforms.