@Lucian Hodoboc
Some thoughts.....
1. IMO, it is baseless to assume that the Bible tells us everything and that God has answered any questions someone might someday have. The Bible is not a "Q&A" book. It is, essentially, a collection of sermons meant to bring us to faith and lead us in life. It's not a textbook.
2. The Bible is clear that Jesus is the Savior. There is no salvation apart from Him; no other name by which salvation is found. And it is clear that essential is Jesus' incarnation, life, death and (especially) resurrection. These are absolutely necessary for that salvation.
3. But the Bible never clearly says why. WHY are these aspects of Jesus necessary? It's a good question! But it's a question never clearly answered. Officially, Christianity has left this issue as MYSTERY (as do the Lutheran Confessions) since no Church Council has ever attempted to answer this.
4. But theories abound! These various theories are sometimes referred to as "Atonement Theories." Most of these were developed early and "fine tuned" during the middle ages. And generally in the West (the Eastern Orthodox Churches generally pursued this less). Your opening post addresses just one of them, one especially popular among modern American "Evangelicals." Luther and Calvin were both fond of a different one, sometimes called "Christus Victor" that stresses the power and conquest of Christ over "the power of sin, death and Satan" as both Luther and Calvin put it. There are several of these. They don't always get named the same or even described the same. Here is a link to ONE such discussion (again, labels and descriptions vary), some count 3, some 7
History and Theories of Atonement - The Gospel Coalition
Read more
faithrethink.com
5. I think most Catholic and Protestant theologians leave ALL of these as theories; each inadequate and problematic IN AND OF THEMSELVES, BY THEMSELVES. Each has good biblical support but still leaves the question not quite answered and sometimes even leave problems with Scripture. I didn't watch the video you supplied, but I'm well aware of the limitations and problems with the Vicarious Atonement view. But all the various theories have their limitations.
IMO, all are sincere attempts. All the various theories have SOME biblical support. But all fall short, all are inadequate. TOGETHER they are helpful but individually, well.... As a Lutheran, I prefer to simply leave this as MYSTERY (a word Lutherans love and use a lot, lol). We know THAT His incarnation, life, death and resurrection are absolutely essential to salvation - but not EXACTLY why.
A blessed Christmas to you and yours.
- Josiah
.this dot is dedicated to my brother MoreCoffee