Hey Vasyl,
I’m not sure that exporting an completed advert out of After Effects is the best way to go.
However, I can’t read Croatian instructions, as I suspect will be the case for most people on COW.
The Slovenia instructions are much kinder than most I’ve seen. Some UK broadcasters will give you “bible” of all of the available formats across all their channels.
Most important:
1) Do you have audio on your animation, if not, why not?
2) They don’t mention it, which is a flag, but is your video REC 709 compliant?
(All you need to know is that this is about colourspace and the grade of your master
https://en.wikipedia.org/wiki/Rec._709)
My approach, as a “dirty” and quick solution, that everybody should be happy with:
IMPORTANT: Make sure that your frame rate is 25fps, and that it is to the exact length to what the contract specifies, or you may get penalised by the broadcaster.
Import your After Effects Composition in to a timeline in Premiere Pro (Using Adobe Dynamic Link, you can take the AE Composition straight in to PPro)
Put on BorisFX Continuum Broadcast Safe filter.
(If you don’t have it, they allow you to trial it, or rent it for a month only:
https://borisfx.com/products/continuum-filters/broadcast-safe/)
Make sure that your audio does not peak in to illegal levels, or are too low.
Export out following the settings for Apple ProRes 422 HQ – they are stright forward to follow.
Maybe for your own library, do an export out without Broadcast safe applied – BUT DO NOT MIX UP THE TWO VERSIONS ON DELIVERY – sorry for shouting, but this is where most deliveries goes wrong.
Also check whether there is any Producer/Post-Production compliance forms that you need to fill out?
Hope that this helped you a little bit towards delivery.
Good Luck – and give yourself a treat once the delivery is completed.
Atb
Mads