Starting around 1:49 it sounds like they're saying it's through Mary that mankind has found redemption.
Do not disrespect the Virgin Mary. It was through Mary that we found redemption, because she is the portal by which heaven came to earth.
She is the proof of the Incarnation of the Son of God. God made flesh.
The hymns they were singing were hymns of Faith, faith in the incarnation of God, but also they were asking her to pray for us to God.
Nothing wrong with asking for prayers, its just like me asking you to pray for me. But let me ask you this: Do you think you are holier or more
righteous than the Virgin Mary and the Saints so that your prayers are stronger?
The effective, fervent prayer of a righteous man avails much. (James5:16*NKJ)
Protestants like to criticize us for praying to the Saints or the Virgin Mary because they think that they are holier or just as holy as every other Christian and don't need their prayers. But this is Christian Communism. Its like they are envious or are terrified at the fact that they may not be as holy as some of the other Christians who lived before them...
I pray for that they come to the True Church so that they find divine healing for their souls, because the Church is a spiritual hospital. We are all sin sick sinners, needing healing and divine grace. The Saints were those who were made God-like and were completely healed of all sin. They are glorified in Christ.