They sound like someone 'doing accents' rather than native speakers of those accents. They are:
First one not numbered: American but not sure of region (could also be Canadian as I can't tell the difference, sorry).
1 New York
2 London/south East England
3 West African but not sure of region (possibly Ghanian)
4 Irish but not sure of region
5 London/South East England
6 English but not quite sure which region they were trying for. Somewhere in the midlands/north England.
7 London/south east (I think attempt at Cockney)