ViacomCBS on Friday said it will redeem $800 million in senior secured notes that mature in 2021. The studio said it will pay off all of its outstanding 4.30 percent senior notes due on February 15, 2021, and with a redemption date of May 4, 2020, and all of its outstanding 4.5 percent senior notes due March 1, 2021, and to be redeemed by May 18, 2020.