As a species, we are transfixed by the spectacle, by the weirdness and the
"WTF? Haven't seen that before?" nature of events and get so engrossed in
merely watching that we don't pay attention to the danger.

In that video, one rabbit was smart and went to ground on seeing the stoat.
The other was doing the equivalent of sitting on the couch, eating popcorn
and watching the entertainment right up to that "Oh F*ck" moment.