That was BG not MG. Loco of the train in which the person travelled was 18307 i.e., WDM-2/KJM/18307. All BG diesel locos start from "WD". All MG locos start from "YD". You can see "WDM-2" in video also. All other locos which come in video start from "WD"
Screenshot source:
click here