The young gospel singer's original Instagram post has attracted over 3m likes, and has drawn praise from former President Barack Obama, basketball legend LeBron James, singer Janet Jackson and actress Lupita Nyong'o.
"It's very exciting because this is what God's called me to do," Keedron, of Jacksonville, Florida, told the Associated Press earlier this week.
"It's just been an exciting experience to work with my mom."
His mother, Johnnetta Bryant, said that watching the video of George Floyd, an unarmed black man, dying as a police officer knelt on his neck last month "really hit my heart just so deeply because I am a mom to a black son.
"I have a black husband. I have black brothers, uncles, cousins, friends."
Warner plans to donate the profits to the National Association for the Advancement of Colored People.