I thought it could be nice to have a thread with interesting videos for devs using the UnrealEngine. Please add your links with maybe a bit of background to the video.
RoboRecall - Drifter converted the original desktop version of RoboRecall for Quest. The video is from the UnrealDevDays in 2019. A 40 minute talk about debugging and optimizing.
Robo Recall by Epic. An Unreal Engine livestream (2017) about all kinds of performance optimizations for the original desktop VR version of RoboRecall. Starts at 14m30s.
Another non-UE video; an hour video of a GDC talk (2017) where Marc Flury (co-creator) talks about the making of Thumper. They wrote their own engine and it took them 7 years.