well i havent watched the video

but here's my assumption with AI

easy - slow moving, slow responding, not man on man defense, and never win rucks

normal - moves same speed as user, same reponse as user, defends man on man, and wins the odd ruck only when user late to select a set-play in time

hard - moves quciker, responds better, defends like a wall, and never loses a ruck, unless isolated from a 60m break and ONLY in REDZONE.

HB have never got the AI to world standard