It's also typical in Connacht (at least South Connemara) to use /u:/ for all past autonomous endings.
I wouldn's say "definitely". She drops the n in an (the n in an isn't the same sound as the n in ngealach) but the a is still there, and her r in ar isn't very distinct, but it sounds more like ar a' ngealach to me, though if I wasn't reading the sentence, and didn't know that ar made more sense than ag, I might not be able to tell.
Why ngealach instead of ghealach?
The previous word ends with an "n", why does the next one start with the same letter?
Note the preposition - ar. Without the proposition, you would have an ghealach, but after ar an, you get eclipsis (except in Ulster).
In this situation, Ulster Irish lenites (ar an ghealach), and the other dialects eclipse (ar an ngealach). Both should be accepted.
Just curious ... how would you say, in Irish, "a man has been put on the moon"? Thanks!