No it’s using the common usage of the word irrelevant rather than the ad industry term of art. In common usage, almost all ads are irrelevant unless they simply help you find what you were already looking for (like a search ad leading to the exact website you were searching for).

The ad that convinces you to buy something you hadn’t thought of before (while watching a video related to that topic) would be considered relevant by the ad industry. But that’s still irrelevant in common usage because you were watching a video, not shopping.