THE NEPHILIM: Offspring of the Sons of God - Documentary

Nephilim were offspring of the "sons of God" and the "daughters of men" before the Deluge according to Genesis 6:4; the name is also used in reference to giants who inhabited Canaan at the time of the Israelite conquest of Canaan according to Numbers 13:33. A similar biblical Hebrew word with different vowel-sounds is used in Ezekiel 32:27 to refer to dead Philistine warriors.

Source: https://www.youtube.com/watch?v=p6j2K9tOBXQ