I appreciate this is research, but I wonder: are these gestures actually semantically distinct information, which the model is better at extrapolating from audi

I appreciate this is research, but I wonder: are these gestures actually semantically distinct information, which the model is better at extrapolating from audio than the listener? Or are they just redundant visual cues that perhaps relieve some cognitive load when communicating with someone? I'm apprehensive about accepting nonverbal communication that a model has appended to a human source.