This video is from the Ryman Auditorium concert and features Derek Webb singing. Derek Webb is part of the Christan band Caedmon's Call. Deliver Us compares the bondage the Israelites faced as slaves in Egypt to the bondage of sin that enslaves us. The song is a prayer that, since there aren't enough lambs for sacrifice to atone for our sins, that God, Yahweh, deliver us from them instead.
Listen closely at the end for God's answer.