Video: Colin Kaepernick's Full Nike Ad

"Believe in something. Even if it means sacrificing everything."

Days after announcing Colin Kaepernick as one of the faces of its new campaign, Nike has released the full two-minute ad -- an emotional tribute to the athletes who "dream big".

Narrated by Kaepernick, the ad also features athletes Serena Williams, LeBron James, Alphonso Davies, a number of athletes with disabilities and others who have overcome adversity.

"If they laugh at what you think you can do -- good," says Kaepernick in the TV spot.

"Stay that way. Because what non-believers fail to understand is that calling a dream crazy is not an insult. It's a compliment."

Nike's share price fell two percent on Tuesday following its announcement of Kaepernick as a face of the campaign, with some people threatening to boycott the brand or even destroying their own Nike products.

READ MORE: When Sports Stars Take A Stand

Kaepernick -- who is a leading voice against police brutality -- has been unsigned from the NFL since 2017, following the start of his kneeling protest during the national anthem before games.

He has been a target of Donald Trump, Fox News hosts and their legions of followers for supposedly disrespecting the troops.

After Monday's reveal, hundreds of people made the claim that US military hero and former NFL star Pat Tillman, who died in combat, would have made a 'better' campaign star.

READ MORE: People Are Destroying Their Own Nikes Over Colin Kaepernick Campaign

READ MORE: Serena Williams Aces Haters In A Tutu

But according to Tillman's own biographer, the soldier would have been the first to support Kaepernick's protest.

"Pat would have found Kaepernick an extremely admirable person for what he believed in," biographer Jon Krakauer told The Washington Post.

"I have no doubt if he was in the NFL today, he would be the first to kneel."

The Nike spot is set to air during the U.S. Open tennis tournament, where Australian John Millman will face Novak Djokovic after defeating world number two Roger Federer in four sets.

Contact the author: abrucesmith@networkten.com.au

Lead image: Nike