RMR (pronounced "rumor") is an American rapper and singer. He first attained notoriety when his song "Rascal" went viral on YouTube in February 2020.
These are videos from concerts where RMR played, so they may be of other bands that played the concert as well.
Lollapalooza 2021 Jul 29 - Aug 1, 2021 Chicago, Illinois, United States Embedded by Concert Archives