https://unrealengine.com/marketplace/en-US/product/crowd-stadium-mocap-pack

Stadium Crowd Animations – Fans at sporting events, watching and interacting with the game, and each other. 108 Animations. INCLUDES: Many variations of sitting and standing with reactions, bored, fidgeting, quiet, excited, upset, joyous, surprised, cheering, clapping, gestures, waiting in line, and much more. A large set of animations to fill out any venue huge or small. Many variations with hands in lap and on knees and standing. People calm, jumping to their feet for a big play, angry at a bad call, clapping with excitement, and everything in between. This pack will bring your crowd to life.