Richard Bauckham: Jesus and the Eyewitnesses - The Gospels as Eyewitness Testimony, 504 pages,
Publisher: Wm. B. Eerdmans Publishing Co. (September 22, 2008), language: English , ISBN-10: 0802863906, ISBN-13: 978-0802863904.
Bauckham makes the case that the Gospels are based on eyewitness testimony and are reliable. I seldom post videos but in this case the material in them is incidental to a discussion of the book and is more informative of the general purpose of the book. There are two videos. Your choice of which to watch may be based on their length.