If you’ve seen any of the previous trailers the channel did that added Deadpool, you’ll know what you’re seeing here.
We get a combination of Deadpool making sardonic comments to the Avengers as well as becoming several of them at various points in the trailer.
The Deadpool-filled trailer gives us all of the video that we got with the new Avengers: Endgame trailer, but replaces all of the audio with commentary by Deadpool, or at least a reasonable facsimile provided by the Mightyraccoon!