Here's a whole bunch of behind-the-scenes footage from the Avengers: Endgame cast

[Spoilers for Avengers: Endgame below.]
The directors and producers of Avengers: Endgame worked hard to ensure that no details of the film’s plot leaked before or even after its release. The filmmakers even went as far as to institute a “spoiler ban” for members of the cast doing interviews, and to ban filming with phones on set. The former measure mostly worked, excluding for Mark Ruffalo, whose Hulk-like desire to give away plot points of these movies simply cannot be contained. The latter measure, however, was less successful, as it seems like basically everyone wanted mementos of their time on set, including directors Joe and Anthony Russo themselves. We’d previously seen some “illegal” behind-the-scenes footage from Chris Pratt, but now that the aforementioned spoiler ban has been lifted, more and more clips and photos are popping up online.
Here’s Ruffalo and Chris Hemsworth showing off some new hairdos, with Ruffalo giving off strong Robert Smith vibes.
And here’s Hemsworth feeling the rhythm at a mariachi party thrown by Robert Downey Jr. for whatever reason.
The Russos gave us some footage of archery training down at the ol’ Barton ranch.
While Robert Downey Jr. shared an unused reunion scene between Tony Stark and Tom Holland’s Peter Parker.