During a 5 hour set though... not sure if someone would randomly accidentally capture the Ayu song in a YouTube video. I guess we'll see when we get some more info! Song titles were displayed next to him so it could have been shown that way. This one EDM channel taped about 17 videos from the concert but most of the songs are collaborations/mixes fans already know of.
https://www.youtube.com/channel/UCjj...XlEDY7HVwlEMfw
Perhaps it'll get covered slightly in one of the tour recap videos on his YouTube channel in a few days?