I posted the song to a Gaelic language forum online (click) and someone came back with the following response:

This is what I can hear:

0:00 I went with Liam Ó Murchú to watch ould Cork being slaughtered. Dúirt sé liom, “tis looking glum, this time we’ve really bought it”
0:08 Ó bhí mé ann agus tiddlywinks, this is macaronic
0:12 Aililiú I’ve the flu, [ní ciú dom?] that sardonic
0:15 De réir mar a thuigeann mise, the plague they’ve caught’s bubonic
0:19 Gach tosaí, every tacaí, ar na midfielders, they’re pussyfoot moronic.
0:23 A Liam, a chroí, a stór, a ghrá, your English is Etonian. Well, you’ve had your chips, your lads are licked, God love ya, old Corconian! Now the real hard men with the Cork Dry Gin mixed in with Coca-Colas, Tá siad cliste gulping pints, uafásach scoring goals.
0:39 CURFÁ
0:54 Canavan, Caffrey, Barney Rock, Anton, Bean, agus P.J. Why’s poor Liam Ó Murchú ag caint faoi Pearse agus Nietzsche? Holden, Hargan, Hazley, Duff, Cott’n-Eye Joe McNally
1:06 The banks have lost the interest in it, [or rara?] [late rally?]
1:10 CURFÁ
1:25 Jim-John O and Captain Drumm, rinne siad an needful; Má thugann ar aghaidh ‘s fuinneamh duit, they musta had a feedful.
1:33 CURFÁ
1:49 Slán go fóill, ar aon nós, Liam, bualadh bos isn't tuillte. Páirc Uí Chaoimh is full of now, “They’re sorry that they built it”
1:57 CURFÁ
I'm not certain about the “Aililiú I’ve the flu” line or the “The banks have lost the interest in it” line; I can't make out the words properly.