What is "original sin" and the "sin nature" according to the scriptures?

Also see

• Is sin "missing the mark"?
• Are we "sinners" or "saints"?
• James 5:16 - confess sins to be healed?
• 1 John 1:9 analysis (If you confess sins, then you will be forgiven?)
• 1 John 5:16-17 - "sin that leads to death"

I actually haven't written a distinct article for this yet.

Here is the video script:

https://www.wiebefamily.org/original_sin_script.txt:

Attribution required: Sue Bentley / FreeBibleimages.org for Adam/Eve photograph.

I grant this work to the public domain.