How to audit mid-roll ad slots across your YouTube channel

Why review older videos#

Ads are usually placed when a video is published and rarely revisited. Meanwhile a lot changes on the channel: new placement practices, automatic slots, editing habits. The older videos keep getting views all the same.

So an archive usually contains three kinds of videos:

• No slots of your own. The video is longer than 8 minutes, but nobody placed mid-rolls. Automatic slots may be enabled in Studio, which is also worth seeing.
• Flagged slots. Slots exist, but YouTube marked some of them as poor.
• Limited ads. A yellow icon on the whole video. That is about content, not placement; we explain the difference in slot feedback vs the yellow icon.

Step 1. Build a list of videos#

An audit needs one list, not dozens of open tabs. For every video it helps to see:

1. Length. Mid-rolls are available on videos 8 minutes or longer, so shorter ones can be skipped.
2. The number of ad slots and whether any are flagged.
3. The video’s monetization icon.
4. Views or revenue for the recent period, to see what people watch now.

In Studio you assemble this by hand: the Content page, filters and each video’s monetization page. With a handful of videos that is enough. With hundreds, a tool that collects it for you is easier (more below).

Step 2. Decide where to start#

You do not need to fix the whole archive in one evening. Start where a review is most useful:

• videos that are watched steadily now: old hits, search-driven videos, evergreen topics;
• long videos without slots of your own;
• videos with several flagged points.

Videos that are barely watched can wait. This is not a YouTube rule, just our practical order: it puts your time where the viewers actually are.

Step 3. Review each video the same way#

For each video on the list, repeat the same routine:

1. Open the ad breaks editor and look at the current layout.
2. Write down the original timestamps, especially manual ones. You will need them if you want to go back.
3. Listen to the flagged points and find a finished thought nearby.
4. In videos without slots, choose a frequency and place slots in pauses; see our guide to choosing ad frequency.
5. Save and wait for YouTube’s evaluation.

If you placed slots by hand before, decide in advance what happens to them on a repeat run. Our article on keeping manual slots explains how.

Step 4. Keep a change log#

For every video, note the date, what was there and what is there now. A simple table is enough: video, date, slots before, slots after, flags before and after. Without it, a month later you will not know which videos you already reviewed or, when comparing revenue, what exactly changed.

Compare revenue before and after an audit with care: season, viewer countries and the Shorts share all affect it. More in why RPM changes when views stay the same.

Working through the archive in Monvilo#

Monvilo collects the data from Studio and shows the archive as one list in the dashboard’s Videos tab. For each video you see revenue, RPM, slots on a mini timeline and flags. Above the list are ready-made filters: videos without slots, limited ads and flagged slots.

Monvilo · dashboard

From there you have two options:

• One at a time. Open a video from the list in Studio and adjust the layout in the Monvilo panel.
• As a queue. Click “Select without slots” and Monvilo selects videos of 8+ minutes with no slots of their own. Then “Optimize archive”: each video opens in Studio in turn, gets slots in speech pauses, is saved and goes through YouTube’s evaluation.

The queue keeps its progress after a page reload and resumes from the saved stage. The original slots of every video can be restored with one command. Keep the working Studio tab active while it runs.

Frequently asked questions#

How often should I audit the archive?

Repeat the audit after major changes: a new ad frequency, edits to older videos or a noticeable shift in revenue. A fixed schedule is your editorial choice, not a YouTube requirement.

Do I need to review videos shorter than 8 minutes?

No, mid-rolls are not available there. Monvilo skips such videos in the queue.

Can I start the queue and walk away?

The queue runs on its own, but inside the Studio tab in your browser. The computer and the tab need to stay on, and it is worth reviewing the result when it finishes.

Sources#

Checked October 25, 2026: mid-roll ads in long videos, monetization icons in YouTube Studio. The dashboard and queue description matches Monvilo 2.25.0; the screenshot uses demo data. The audit order is our practical recommendation, not a YouTube rule.