Plus, The New Testament when it was first recorded, was written down not in Aramaic or Hebrew, but in Greek.
Well Luke was certainly in Greek, as the video mentioned. But Jesus probably was speaking Aramaic. That is why the video has to guess at Jesus's literal words that were then translated to Greek.
BTW, perhaps not all the New Testemant was originally Greek. Some scholars favor the theory that Mathew wrote his gospel in Hebrew.