Footage posted by the online news site Loopsider shows the man, identified only as Michel, being repeatedly beaten as he tried to enter a music studio in Paris’s 17th arrondissement.
The incident comes as concern grows over a new French bill that would criminalise the publishing images of police "with intent to harm".
The legislation, which the government is pushing through parliament, has prompted protests from civil liberties groups and journalists.
Ça s'est passé samedi à Paris. 15 minutes de coups et d'insultes racistes.
— Loopsider (@Loopsidernews) November 26, 2020
La folle scène de violences policières que nous révélons est tout simplement inouie et édifiante.
Il faut la regarder jusqu'au bout pour mesurer toute l'ampleur du problème. pic.twitter.com/vV00dOtmsg
In a Twitter post, Darmanin said the IGPN police watchdog was investigating the alleged assault, which took place on Saturday as the man was being arrested.
[Intervention à Paris 17ème]
— Gérald DARMANIN (@GDarmanin) November 26, 2020
Je me félicite que l’IGPN ait été saisie par la justice dès mardi.
Je demande au préfet de police de suspendre à titre conservatoire les policiers concernés. Je souhaite que la procédure disciplinaire puisse être conduite dans les plus brefs délais.
Michel told reporters that he had been walking along without a face mask, which is against health regulations. and went into his music studio after spotting the police car.
He said the police then followed him inside the studio, where he was physically and racially attacked.
Michel's lawyer, Hafida El Ali, said: “He asked them what they wanted, if they wanted to check his identity... They didn't stop beating him, the video of the violence lasts for 12 minutes.”
El Ali said that nine others who were recording music in the studio basement were also beaten.
Michel told Associated Press that he felt assured “now that the truth is out”.
“I want to understand why I have been assaulted by people who were wearing a police uniform. I want justice, because I believe in the justice of my country," he said.
France has recently seen a spate of high-profile probes into police violence.
(with wires)
