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"We've been told auto captions aren't acceptable. But manually editing 200 lecture videos will take months."
— Instructional Designer, r/instructionaldesign (53 upvotes)
YouTube and Zoom auto-captions are full of errors. Manual editing takes hours per video. Here's how to speed it up 10x with AI cleanup.
2-4 hours
Manual caption editing per 60-min video
15-30 min
With Aelira AI cleanup + review
Auto-captions don't know discipline-specific vocabulary. Results are gibberish.
Auto-Caption
"the mitochondria is responsible for 80 p production"
Should Be
"the mitochondria is responsible for ATP production"
Auto-captions run sentences together. Screen readers can't parse meaning.
Auto-Caption
"the results were significant however we need more data to confirm our hypothesis lets look at the next slide"
Should Be
"The results were significant. However, we need more data to confirm our hypothesis. Let's look at the next slide."
Proper nouns, researcher names, and acronyms are frequently incorrect.
• "nietzsche" "neat chick"
• "WCAG" "weak egg"
• "Foucault" "fu co"
• "PyTorch" "pie torch"
WCAG 1.2.2 requires identifying speakers in multi-person videos. Auto-captions don't do this.
Auto-Caption
"that's a great point what do you think about X?"
Should Be
Professor Smith: That's a great point.
Student Johnson: What do you think about X?
Typical workflow for 60-minute lecture video:
1. Download auto-captions from YouTube/Zoom: 5 min
2. Watch video + fix technical terms: 90 min
3. Add punctuation + capitalization: 30 min
4. Add speaker labels (if panel/interview): 45 min
5. Final review + upload: 15 min
Total: 3 hours per video
× 200 videos per semester = 600 hours of work
Export auto-generated captions from YouTube/Zoom/Teams. Upload VTT or SRT file to Aelira.
Give AI a list of technical terms, names, acronyms used in the video.
Aelira's AI (Llama 3.2) automatically:
Review AI-cleaned captions. Fix any remaining edge cases. Export final VTT/SRT.
Manual Editing
3 hours/video
With Aelira
20 min/video
90% faster
Save 2.5 hours per video
Process 200 videos in 67 hours (vs 600 hours)
Unintelligible to students relying on captions
Fully accessible and accurate (30 seconds AI processing)
Manual Editing
With Aelira
Save 114 minutes per video (85% time reduction)
Let AI clean up auto-captions in seconds, not hours.
30-day free trial · Process 10 videos free · No credit card required
Watch Aelira clean up a 60-minute lecture caption file in 30 seconds. Join 500+ universities preparing for April 2026.