Turn YouTube Into a Comment Data Goldmine

If you’ve ever tried collecting YouTube comments manually, you already know how painful it is—opening videos one by one, scrolling endlessly, copying text… it just doesn’t scale.

This script fixes that.

The YouTube Comments Previewer lets you see real comments directly inside the video grid—without even opening the video. On top of that, you can export everything into CSV with a single click.

What This Script Actually Does

Instead of forcing you to dig into each video, it quietly runs in the background and:

Pulls comments using YouTube’s internal API
Displays a preview right next to each video
Shows author name + comment + “time ago”
Collects data across multiple videos automatically
Lets you export everything as CSV

So while you scroll YouTube, you're basically building a dataset without extra effort.

Key Features

1. Inline Comment Preview
Each video card gets a mini sidebar showing real comments. No extra clicks needed.

2. “Time Ago” Support
You don’t just get comments—you get context like “2 days ago”, which is useful for trend analysis.

3. Bulk Data Collection
The script keeps collecting comments as you browse. You don’t lose anything unless you clear it.

4. One-Click CSV Export

Export comments for a single video
Or export everything you’ve collected so far

5. Lightweight Dashboard
A floating panel gives you:

Export button
Clear memory option

Why This Is Useful

This isn’t just a “nice UI tweak.” It’s a serious tool if you're into:

Lead generation
Sentiment analysis
Competitor research
Content idea validation
Audience targeting

You can quickly spot:

What people are asking
What problems they mention
What products they’re interested in

How It Works (Simple Explanation)

The script taps into YouTube’s internal API (youtubei/v1/next) to fetch comment data without opening the video page.

Then it:

Extracts comment details (author, content, time)
Injects a preview UI into the video grid
Stores everything locally in memory
Converts data into CSV using PapaParse

All of this happens silently while you browse.

How to Use It

Install Tampermonkey
Add this script
Open YouTube homepage or search results
Scroll normally

You’ll start seeing comment previews automatically.

When you're ready:

Click “Export Overall CSV” to download everything
Or use “Export This Video” for specific data

Final Thoughts

If you're doing anything with data—especially scraping or automation—this is one of those small tools that saves hours without feeling like a “tool.”

It just blends into your workflow.

And that’s exactly what makes it powerful.