> "It's not a short ad; I've seen it several times, so one of the times I recorded it."

FWIW, YouTube ads are just normal, unlisted videos. You can get their ID by:

- right-clicking on the video while the ad is playing,

- selecting 'Stats for nerds',

- copying the 'Video ID' from the debug info in the top left corner,

- appending this ID to 'https://www.youtube.com/watch?v='

This also allows you to see the account associated with the ad and how often this ad has been played already.

For example, here's a (German) scam ad promoting a cheap ceramic heater as having "effectively no energy costs": https://www.youtube.com/watch?v=WorrpfjAYdc