Avengers: Infinity War -- Watch Iron Man Answer Fan Questions About The Movie

Iron Man actor Robert Downey Jr. has posted a silly video to his Facebook page in which he answers a series of fan questions before getting interrupted by directors Joe and Anthony Russo. Star-Lord actor Chris Pratt also stops by at the end for a quick segment.

Downey Jr. starts the video by talking about how he has his own personal camera man follow him around set. As it turns out, this camera man is none other than...well, you should watch the video to find out. You can probably guess who it is before the video ends.

As for the questions that Downey Jr. answers, you can some of the responses below. Among other things, he says the story for Infinity War "literally feels like the second-greatest story ever told," featuring a number of twists and appearances by many Marvel superheroes.

Last week, Marvel released some behind-the-scenes footage of Infinity War, which features Thanos as the main antagonist.

"Avengers: Infinity War is the culmination of the entire Marvel Cinematic Universe that started in May 2008 with Iron Man," Marvel boss Kevin Feige said. "Thanos shows us why he is the biggest, the best, the baddest villain that we've ever had. And the most frightening villain that the Avengers have ever faced."

Avengers: Infinity War hits theaters on May 4, 2018, while the untitled fourth Avengers movie follows on May 3, 2019.

Avengers Q&A With Robert Downey Jr.

What excites you most about being back with the Avengers?

• "I can't give too much away but this literally feels like the second-greatest story ever told. And there's so many characters and such much interesting story; so many surprises."

If you could have any other Iron Man armor, which one would you like to take from the set?

• "I still fondly remember the Mark 42 from Iron Man 3."

Are you and Captain America still not getting along?

"That is correct. He is on my S list."

What has changed the most about playing Tony Stark since the first Iron Man?

• "He's matured a little bit, and I think what's changed is the universe around him, honestly, if you think about it, right? There's so many offshoots now. Peter Parker is in the mix. Guardians are on fire."

What's your favorite thing about waking up and playing Iron Man?

• "There is a certain cred that I don't deserve. I'm definitely not as cool as he is. But sometimes I look in the mirror and go, 'Just keep it Tony and everything's going to be all right.'"