Johannesburg - Economic Freedom Fighters supporters began marching to the SABC offices on Tuesday with thousands of people making their way down Empire Road.
Five police cars led the march with a sea of red berets behind.
Placards were hoisted high in the air as supporters sang and danced and calls of "voetsek man" echoed on the street.
A placard read "SABC belongs to Zuma and ANC - let's go burn it", while another said "The secrecy bill is not yet signed so why hide our EFF advert - A luta continua" (the struggle continues).
Marshalls struggled to contain marchers. Both sides of Empire Road were occupied by marchers, causing a traffic jam.
The march is in protest against the public broadcaster refusing to air the party's election commercial.
The SABC claims the advert, which features the slogan "destroy e-tolls physically", incites violence.
EFF leader Julius Malema walked in front, wearing a red EFF T-shirt, black trousers, red shoes and a red EFF beret.
People watched through the windows of office parks as the marchers passed by. Download the app by visiting one of these app stores.