The Nigerians living in Ireland are generally the more affluent ones (how else would they afford the plane fare for a start?) mostly of one particular ethnic group (there are literally hundreds) and are attracted by opportunities in Ireland, particularly the fact that there is education, healthcare provided free. Unfortunately there is also a belief that because things are free, they are there to be taken advantage of. A system that is relatively fair is also there to be abused for some of them.
The ones in the video...I don't know what type of people they are, I really honestly don't.