Can anyone tell what certification each agency actually requires and checks to upload footage to their collection?

Do any of them ask for details of the certifications / licensing / flight training / registration required for the country of the artist or the country where the footage is taken?

Agencies require zero certification.

As far as I know, zero. And if they did, I'd say no.

Some drone news:

After updating my DJI app today, I was surprised to discover that, as of January 13, 2025, DJI, the world�s leading drone manufacturer, has officially removed its �geo-fencing� feature. In this blog post, we�ll dive into the implications of this bold move and what it means for current and future drone pilots.

https://brutallyhonestmicrostock.com/2025/01/15/djis-bold-move-why-the-worlds-leading-drone-maker-removed-geo-fencing/

And the link to the Gatwick Airport shut down. "Photograph: Alexandre Rotenberg/Alamy"  Interesting was, as usual, near the end of the drama,

"At 6pm, military trucks arrived at Gatwick with an anti-drone system designed for battlefield operation, and installed it on the roof of the south terminal. This system can track and disable drones; it works by jamming the radio frequency connecting the drone to its controller. At 9.30pm, Gatwick�s chief operating officer Chris Woodroofe announced that the airport would remain closed overnight because of new drone sightings. The military system was operational by around 10pm. It did not pick up a single thing."

So either the sightings were mistaken ID of drones, or false, or the military equipment, doesn't work?