https://www.cnet.com/news/all-avengers-endgame-trailers-and-posters-russia-loves-black-widow/

The featurette shows interviews with actors Chris Evans, Robert Downey Jr., Chris Hemsworth and others talking about how the surviving superheroes are "trying to keep their heads above water" in dealing with the aftermath of the deadly Thanos Snap. 

Scarlett Johansson reveals that her Black Widow/Natasha character "is a little bit hardened from what she's had to go through."