Why Kakashi's Copying Jutsu Makes No Sense

Kakashi's famous Sharingan ability is to copy his opponent's ninjutsu. But there's a problem with this jutsu. It's related to a Naruto retcon that Kishimoto implements later in Naruto Shippuden. So, does it lead to a Naruto plot hole? It happens during the Kakashi vs Zabuza and Kakashi vs Kisame fights. Let's find out. Become a member to get cool perks: https://www.youtube.com/channel/UCOtn4rEY_fVhpetxmfbxG2A/join Like the video! Subscribe to DygoKnight: https://www.youtube.com/channel/UCOtn4rEY_fVhpetxmfbxG2A/featured?sub_confirmation=1