We’ll take a look at the UE4 Virtual production techniques and technologies behind in-game Fortnite events such as the Travis Scott concert, and Grayson will cover a variety of tricks in Sequencer for improving cinematic and event workflows in 4.25.
https://dev.epicgames.com/community/learning/livestreams/1Jl/virtual-production-techniques-for-live-events-inside-unreal