A video caption and subtitle overlay generated with AI means using a tool like Whisper, CapCut AI, or Descript to transcribe your video audio, clean up the transcript, time-sync the captions, and export them as an overlay or SRT file. Videos with captions see 40% longer average watch time because 85% of social video is watched without sound. At aidowith.me, the Reels route covers this in 10 steps over about 1 hour. You'll transcribe the audio, review AI-generated captions for accuracy (typically 92-97% accurate for clear speech), fix the common errors (proper nouns, technical terms, filler word removal), time-sync the text to match the speech, and style the subtitle overlay to match your brand. The route covers 3 platforms: Instagram Reels, TikTok, and YouTube Shorts, each with different caption format and export requirements. You'll finish with a repeatable captioning process for every future video.
Last updated: April 2026
The Problem and the Fix
Without a route
- You're filming great content but watch time drops after 5 seconds because 80% of your audience scrolls with sound off
- Manual captioning takes 30-45 minutes per video: you type while watching the video at 0.5x speed
- Auto-generated platform captions are 70-75% accurate and embarrass you with wrong words in the first sentence
With aidowith.me
- Generate 92-97% accurate captions for a 60-second video in under 5 minutes using Whisper or Descript
- Fix the 3-5 common AI captioning errors in under 10 minutes using a systematic review checklist
- Export captions in the right format for Instagram, TikTok, and YouTube Shorts from the same source file
Who Builds This With AI
Marketers
Content, campaigns, and briefs done in hours instead of days.
Founders
Move fast on pitches, pages, research. AI as your first hire.
Managers & Leads
Reports, presentations, and team comms handled faster.
How It Works
Transcribe with AI and review accuracy
Run your video through Whisper (free), Descript, or CapCut AI captions. AI transcribes at 92-97% accuracy. Review using a checklist: proper nouns, technical terms, homophones, and filler words are the 4 categories where errors cluster.
Fix errors and time-sync the captions
Edit the transcript for accuracy, then check the time-sync: does the caption appear when the word is spoken, not 0.5 seconds before or after? Most AI tools sync automatically, but fast speech and overlapping audio need manual adjustment.
Style the subtitle overlay and export
Choose a caption style that fits your brand (white text with dark outline, colored highlight, or animated word-by-word). Export as an overlay burned into the video for Instagram and TikTok, and as an SRT file for YouTube.
Add Captions to Your Videos Today
Follow the 10-step Reels route at aidowith.me and add accurate subtitle overlays to your social videos in about 1 hour.
Start This Route →What You Walk Away With
Transcribe with AI and review accuracy
Fix errors and time-sync the captions
Style the subtitle overlay and export
Export captions in the right format for Instagram, TikTok, and YouTube Shorts from the same source file
"Captions added 38% to my average watch time overnight. I use Whisper for the transcription and it takes 8 minutes per video end to end. It used to take 45 minutes manually."- Video content creator, online fitness brand
Questions
Use Whisper, Descript, or CapCut AI to transcribe the audio, review the transcript for accuracy in 4 error categories (proper nouns, technical terms, homophones, filler words), adjust the time-sync if needed, style the overlay, and export. The aidowith.me Reels route covers all 10 steps in about 1 hour and includes platform-specific export instructions for Instagram, TikTok, and YouTube Shorts.
OpenAI's Whisper is the most accurate free tool at 95-97% for clear speech. Descript is similar with a better editing interface and timeline view. CapCut's auto-captions are fast and good enough for social content at 90-93% accuracy. Platform auto-captions from Instagram and TikTok run 70-80% and need heavier editing, especially for technical or brand-specific vocabulary.
YouTube's auto-captions are around 80% accurate and often misformat proper nouns and technical terms. For short-form content where every word is visible on screen, errors are obvious. Adding your own accurate captions or SRT file gives you 95%+ accuracy and lets you control styling. The route includes how to upload an SRT to YouTube Shorts specifically.