From the YouTube Notes:
The Divine Liturgy, θεία λειτουργία, of St. John Chrysostom is the second most practiced Liturgy in Christendom (next to the Roman rite Mass). This video is a tribute to the great Liturgy of the east, not a live presentation of it. This is the primarily used Divine Liturgy of the Eastern Churches (Catholic and Schismatic). This video contains a number of images of the Liturgy in practice across a wide array of churches and rites.
The musical selections, from the CD "Sacred Treasures" are (in order):
The Great Ektenia at 0:01
Cherubic Hymn at 3:42
Amen and With Thy Spirit at 7:56
and Otche Nash at 9:11
God bless you all.
"Our Father" by Bulgarian National Choir