I was just having this conversation about an hour ago with @bleepcoin!
I said that it always amazes me, that people realise that a story told across just 10 people, in the same timeframe will change drastically. Yet they expect one that's been told by tens of thousands of people, across a 1500 year timespan, to be the same.
I've seen eye witness experiments of people reporting things that were wildly inaccurate, from something they saw 15 minutes previously. Yet people will still talk about the bible as an eye witness account; very strange.
CG
If you watch the first video you will see that the argument that the scriptures have been corrupted via a serial process of retellings is utterly false. There are 5600 manuscripts, many dating to the first generation of contemporaries that have been collected from all over the Mediterranean area. By the time this first generation of witnesses died out, the documents were widely dispersed and beyond recall for mass editing.
These are corroborated with many other authors from that era who quoted them extensively. This was not done in a vacuum, because these Scriptures were in active use by hundreds of widely distributed churches hiding from the Roman government. There is simply no way that a deliberate or accidental change in one copy could be propagated to all copies in existence – especially since these copies were kept in hiding during the first three centuries of Christian persecution on penalty of death.
All this makes it possible to reconstruct the original Greek texts with 99.5% accuracy and virtual certainty with respect to the intended message. All mainstream editions of the Bible today were translated by separate teams of experts in the past several centuries from the original Greek. The Dead Sea Scrolls discovered in a cave near Jerusalem in 1947 were over 2000 years old, yet matched today’s copies of the Old Testament exactly.
So there is zero chance of the kind of errors you are talking about being inserted without detection. It simply didn’t happen.
As for your eye witness accounts, there is a huge difference between eyewitnesses to a surprise event lasting several minutes and the accounts of a group of 11 understudies who followed the Master around for 3.5 years, heard him teach and saw his miracles repeated many time each day - and then continued on for decades traveling and teaching and writing about what they had learned. It's not hard at all to imagine that their accounts were accurate, especially since they were promised supernatural help in recalling all that Jesus had done and said. Not to even mention Paul, who studied under the legendary Rabbi Gamaliel and was the leading "Rhodes Scholar" of his generation.