Unfortunately there are no eyewitness accounts of the life or teachings of Jesus anywhere in the Bible or elsewhere. Even conservative Christians concede that the Gospels of Mark and Luke were not written by eyewitnesses. Scholars say that all the New Testament gospels were written anonymously and that they were not attributed to Matthew, Mark, Luke and John until later in the second century. They say that the Gospels of Matthew and John were unlikely to have been written by the disciples of those names, so that even these gospels were not eyewitness accounts.
The gospels are certainly accounts about Jesus, but they were not written by eyewitnesses or even by some who knew eyewitnesses.