https://www.theverge.com/2018/3/21/17147654/epic-games-fortnite-replay-system-unreal-engine-4-streamers-youtube-twitch

Epic Games today announced that it’s developed a new replay editor for its Unreal Engine so that game developers can create more streamlined highlight-making tools for players. The news, announced as part of Epic’s annual “State of Unreal” show at the Game Developers Conference in San Francisco, means that it will be easier than ever to take recordings of game footage and edit them into professional-looking clips for YouTube. Epic even flew out British YouTube personality and Twitch streamer Alastair “Ali-A” Aiken to demo the feature with a custom Fortnite Battle Royale video he made with help from the Epic team.

Epic is stressing that this tool will be available for all developers using the Unreal Engine, meaning it won’t be restricted to just Epic-made games like Fortnite. However, it does make sense that the company would show it off with Fortnite and design it specifically with that game’s streaming and YouTube audience in mind.