Seems unlikely to be fruitful to look to the animal kingdom as a benchmark for moral purity (and by human standards at that).
In another video, a chimp or Gorilla father stared down an adolescent when he/she threw dirt on the father.
I think animals are much more brutal than just beating. Many do infanticide / cannibalism frequently.
Depends on the severity, frequency, and reason. It might not be that grotesque. For example, I was spanked when I was bad. Does that fit the definition?