How to Add Captions to a Video Using Descript

Adding captions to a video using Descript means generating and styling text overlays that display the spoken words on screen in real time, making the video accessible to viewers who watch without sound and improving engagement across all social media platforms. In the Content Factory, captioning is a Process stage task that happens during or immediately after video editing.

Captions are not optional—they are essential. Over 85% of Facebook video is watched without sound. Instagram, LinkedIn, and Twitter/X have similar silent-viewing patterns. A video without captions loses the majority of its potential audience. Descript generates captions automatically from its transcription, and you can customize the style, position, font, and animation to match your brand. This guide covers the full process from enabling captions to styling and exporting them.

Where Captioning Fits in the Content Factory

Captioning belongs to the Process stage and is typically the final editing step before export. It depends on having an accurate transcription in Descript and a cleaned-up audio track. After captions are added, the video is ready to be uploaded to YouTube, embedded on a web page, and cross-posted across social channels.

Prerequisites

You need access to the BlitzMetrics Descript account, a project with video that has been transcribed and edited, the client’s brand colors and font preferences for caption styling, and knowledge of the destination platform (which determines caption position—bottom banners for most social media content).

Step-by-Step Captioning Process

Step 1: Enable Captions in Descript

In your Descript project, navigate to the captions settings. Descript automatically generates captions from the transcript, so the words are already mapped to the correct timestamps. Enable the caption overlay to make them visible on the video.

Step 2: Review Caption Accuracy

Play through the video and verify that every caption matches what is being said. Fix any transcription errors that would appear as incorrect captions. Pay special attention to proper nouns, technical terms, and industry jargon that automated transcription often gets wrong.

Step 3: Style the Captions

Customize the caption appearance to match the client’s brand. Set the font, size, color, background color, and position. For most Content Factory videos, captions appear in the bottom banner area. Use a background color that provides sufficient contrast for readability. Keep the font size large enough to read on mobile devices.

Step 4: Adjust Timing and Line Breaks

Review the caption timing to ensure words appear and disappear at natural speech boundaries. Adjust line breaks so captions are easy to read—no more than two lines at a time, and no single words hanging on a line by themselves. The reading pace should match comfortable reading speed.

Step 5: Export with Captions Burned In

Export the video with captions burned into the video file (hardcoded) for social media platforms where separate caption files are not supported. For YouTube, you can export a separate SRT caption file instead, which allows viewers to toggle captions on and off.

Verification Checklist

All spoken words have accurate captions. Caption styling matches the client’s brand guidelines. Captions are readable on mobile devices. Line breaks occur at natural speech boundaries. Caption timing is synchronized with the audio. There are no typographical errors in the captions. The exported video includes captions (burned in or as a separate SRT file depending on the platform).

Related Resources

Captioning depends on accurate transcription in Descript and clean audio editing. Captions are required for one-minute videos (in the bottom banner). For the full Content Factory pipeline, see The 4 Stages of the Content Factory.

Take the Next Step

Captions make your content accessible and dramatically increase engagement. To learn the complete video production system, enroll in BlitzMetrics courses. For done-for-you captioning and video production, explore the Content Engine Package.