Wow. I swear I've never seen this subforum before.
I'll quote the Church.
OCA - The Orthodox Faith
"It is the conviction of the Orthodox that Christ is the only priest, pastor and teacher of the Christian Church. He alone guides and rules his people. He alone forgives sins and offers communion with God, his Father.
It is also the Orthodox conviction that Christ has not abandoned his people, but that he remains with his Church as its living and unique head. Christ remains present and active in the Church through his Holy Spirit.
The sacrament of holy orders in the Christian Church is the objective guarantee of the perpetual presence of Christ with his people. The bishops, priests, and deacons of the Church have no other function or service than to manifest the presence and action of Christ to his people. In this sense, the clergy do not act in behalf of Christ or instead of Christ as though he himself were absent. They are neither vicars of Christ, nor substitutes for Christ nor representatives of Christ.
Christ is present now, always, and forever in his Church. The sacramental ministry of the Church -- the bishops, priests, and deacons -- receive the gift of the Holy Spirit to manifest Christ in the Spirit to men. Thus, through his chosen ministers, Christ exercises and realizes his unique and exclusive function as priest, perpetually offering himself as the perfect sacrifice to the Father on behalf of his human brothers and sisters. Through his ministers in the Church, Christ also acts as teacher, himself proclaiming the divine words of the Father to men. He acts as the good shepherd, the one pastor who guides his flock. He acts as the forgiver and healer, remitting sins and curing the ills of menÄphysical, mental and spiritual. He acts as bishop, overseeing the community which he has gathered for himself (1 Pet 2:25). He acts as deacon (which means servant or minister) for he alone is the suffering servant of the Father who has come "not to be served, but to serve, and to give his life as a ransom for many" (Matthew 20:28).
The sacrament of holy orders takes its name from the fact that the bishops, priests and deacons give order to the Church. They guarantee the continuity and unity of the Church from age to age and from place to place from the time of Christ and the apostles until the establishment of God's Kingdom in eternity. As the apostles received the special gift of God to go forth and to make Christ present to men in all of the manifold aspects of his person and work, so the clergy of the Church receive the gift of God's Spirit to maintain and to manifest Christ's presence and action in the churches."
It is the doctrine of the Church that the clergy must strive to fulfill the grace given to them with the gift of the "laying on of hands" in the most perfect way possible. But it is also the doctrine of the Church that the reality and effectiveness of the sacraments of the Church ministered by the clergy do not depend upon the personal virtue of the ministers, but upon the presence of Christ who acts in his Church by the Holy Spirit.
YouTube - Orthodox Priest Ordination in English Part 1
YouTube - Orthodox Priest Ordination in English Part 2
YouTube - Orthodox Priest Ordination in English Part 3
YouTube - Orthodox Priest Ordination in English Part 4
And here is a more..... complete one.
YouTube - Ordination of SubDeacon Maxime to the Holy Diaconate Part 1
And I don't think the Orthodox Church accepts Protestant ordinations, since you can't have a valid sacrament of Holy Orders outside the Church. I don't really know for sure though. I'd be perfectly fine if an Orthodox poster wants to correct me on any of this.