YouTube ad library — it lives inside Google's

There is no separate YouTube ad library

This is the answer most people are looking for and rarely get stated plainly. YouTube does not run its own ad archive. YouTube advertising is bought through Google Ads, so YouTube ads are published in Google's Ads Transparency Center alongside Search, Display, Shopping, Maps and Play — and the way you look at them specifically is to apply the YouTube platform filter.

That is what the form above does. It takes an advertiser's domain, sends it to adstransparency.google.com and attaches the YouTube filter, so the results are the video ads that advertiser has served on YouTube rather than everything they run everywhere.

The tool is free, works without a Google account, and tells the advertiser nothing.

The date cutoff that will mislead you

Google carries a warning above the results whenever a platform filter is on, and it is easy to scroll past. The platform filter only reaches ads shown from 4 September 2023 onwards. Anything served before that date is excluded from the results entirely while the filter is active.

The practical consequence: a YouTube-filtered search on a long-established advertiser can look thinner than their Search and Display activity, and the difference may be the cutoff rather than their strategy. If you are judging how committed a competitor is to video, compare their YouTube-filtered count against the same window on other platforms, not against their all-time total.

The ratio is the useful number, and it varies enormously. Squarespace shows roughly four thousand ads across all Google platforms in a US-scoped search and roughly nine hundred with the YouTube filter on — video is a serious but minority channel for them. Samsung runs about twenty thousand and around two thousand on YouTube, a similar shape at ten times the scale. Duolingo inverts it: a US search returns a few dozen ads in total and the clear majority of them are YouTube. Three advertisers, three completely different bets, readable in about ninety seconds.

Clearing the platform filter and switching the format filter to video is the useful cross-check. It reaches further back and shows you every video creative they have run, without attributing it to a placement.

What you can see about a competitor's YouTube ads

Each result gives you the video creative itself, the verified advertiser behind it, and the dates it was first and last shown. Because Google verifies advertiser identity before allowing them to buy, the name attached to a creative is a real legal entity — which is how you spot that the ads are being bought by a media agency, or by a regional subsidiary rather than the global brand.

The names are worth reading rather than skimming. A US-scoped YouTube search on samsung.com attributes the ads to Samsung Electronics America, not to the Korean parent — the buying sits with the regional business. Squarespace's ads come back under both Squarespace, Inc. and Squarespace Ireland Limited, which is the shape of a company running its US and European media out of separate legal entities. On nike.com the accounts include Nike Retail BV and, alongside them, an outside agency buying in one market. None of that is stated anywhere; it is just the advertiser column, read carefully.

The region filter matters more on YouTube than anywhere else, because video budgets are usually concentrated in a few markets. An advertiser can be invisible in one country and prolific in the next.

Video ads are the most expensive creative a competitor makes, and the most revealing. A hero film reused for eighteen months tells you they have one story they trust. A run of short variants with the same opening three seconds tells you they are testing hooks, and the hook that survives is the one that worked.

What is not published

No spend, no impressions, no view counts, no completion rates, no targeting. Google publishes none of it for commercial advertising, and no filter combination reveals it. Election ads are the exception, in Google's separate political advertising section, where spend and reach are disclosed as a legal requirement.

There is also no export and no public API. What you can do is copy the link to an individual creative, which is stable enough to paste into a brief.

One adjacent tool is worth knowing about, because it answers a question people often bring here by mistake. Paid product placements, sponsorships and endorsements — creator content a brand paid for, rather than media it bought — are disclosed separately on YouTube itself, not in the Transparency Center. If you are researching a competitor's influencer spend rather than their ad account, that is the trail to follow.

Why watching video ads by hand does not work

Every limitation of the Transparency Center is amplified for video. A video ad takes thirty seconds to evaluate rather than one, so a competitor with forty creatives is a genuine sitting. Do that monthly across three competitors and you have given up an afternoon to work you will not remember accurately by the next one.

The information you actually want is comparative anyway: which of these are new, which have quietly stopped, and which have been running long enough that they are clearly paying for themselves. The Transparency Center does not mark any of that. It shows you a pile and leaves the sorting to you.

So the honest summary is that Google publishes enough to make competitive video research possible, and nothing that makes it repeatable.