The Dubai track had a different TOD in the PC build which was used as a source for the earlier videos. The Xbox One X build on the show floor had this vastly more realistic lighting TOD (the PC build looked like a mid-day setting which has always looked like crap with it's super blue sky and overly contrasty colors like in Forza Horizon during the same TOD).
The Dubai track vids that you are referring to are not about TOD but Gamersyde trying to convert a HDR source into an SDR source so it didn't look correct.