Highlight Reels are replays of races and battles in Mario Kart 8 and Mario Kart 8 Deluxe. After a race or battle, the player has the option to see the highlights of the race or battle. They show the player(s) in portions of the race or battle for 30 seconds. This can be edited to show highlights for 45 and 60 seconds, or the entire race or battle. The drivers it features can also be changed, as well as the types of events (action, drifting, items) and if the course music will play, or just sounds. While watching the highlight reels, the player can speed it up by tilting to the right, slow it down by pressing , and rewind it by tilting to the left.
Up to six Highlight Reels can be marked as favorites by pressing the button ( in Mario Kart 8 Deluxe) at the end of the race or battle. Highlight reels can be viewed in Mario Kart TV.
Prior to the termination of the Miiverse service on November 7, 2017, Mario Kart 8 players could share their Highlight Reels worldwide and view other players' Highlight Reels in two sections: "Global: Popular" and "Global: Recent."