"Chadwick was an amazing actor who we thought would fit perfectly with the MCU," Marvel chief Kevin Feige says in the video posted Sunday.
The video features interviews with actors and filmmakers, and behind-the-scenes footage of Boseman, who privately dealt with colon cancer for four years.
"A lot of the things about the character are also true about Chad,"director Ryan Coogler says in one of the interviews. "He's very knowledgable. He's an athlete, a martial artist. He's had a lot of experience playing roles that come with a lot of weight."
"He as a guy has a lot of weight to him."
Boseman first appeared as Black Panther in Captain America: Civil War, before starring in 2018's Black Panther. The solo film took $1.3 billion worldwide, becoming one of Marvel's highest-grossing movies at the time. It later became the first superhero film to earn a Best Picture nomination and win an Oscar -- for costume design, original score and production design.
"It's fun to watch what it means to people," Boseman says in an interview of his role as the superhero. "What does this do for the world? Is it actually valuable in this climate? And I have to say yes. Not because it makes people escape. I think, when done right, it gives people hope."
Many actors and filmmakers have he posted on Instagram Sunday.to Boseman, as has former president Barack Obama. "To be young, gifted, and Black; to use that power to give them heroes to look up to; to do it all while in pain – what a use of his years,"
"You will always be our king," Marvel says to end its tribute.