The homily from Sacred Heart Cathedral, Hamilton for the Solemnity of the Most Holy Trinity, Year B can be listened to here. The preacher is Bishop Bill Wright, Bishop of Maitland-Newcastle.
The readings proclaimed were Deuteronomy 4:32-34, 39-40; Romans 8:14-17; Matthew 28:16-20.
You can watch the whole Mass by visiting the Cathedral YouTube channel here.