The Origins Of The Torah - The Documentary Hypothesis
Channel: Tom Greenwell
Date: 2016-05-24

This video relies on James Kugel's book, 'How to Read the Bible'
https://www.amazon.com.au/How-Read-Bible-Guide-Scripture/dp/0743235878 

John Hamer provides a much more detailed account of the Documentary hypothesis here:
https://youtu.be/tpUhXfSToFA 

The Bible is the best-selling book ever. But who wrote it? According to the Documentary Hypothesis, the first five books (the Torah or Pentateuch) are actually a combination of four or more sources created by different authors over many centuries.