That means if you see 'AHT' without bruises (etc) it was probably not actual shaking.
Anyway, we don't need this level of scientific detail and knowledge to say that no one should ever shake a baby. All brutal gestures are obviously harmful and dangerous.
[1] https://link.springer.com/article/10.1007/s00381-022-05577-6
So, why is this video specifically about shaking? Because of this very specific and narrow conspiracy theory that takes children away from their parents.