In certain speeches acting out actions is a good way of engaging with the audience. The visual cue helps them envisage what your words are describing.
In another speech facial expression is the way to make an impact, especially if irony is involved. Dramatize the speech. In some ways the close up of the face of the speaker afforded by Zoom allows for more facial expression than in real life. You can approach the camera on Zoom, but in real life you could also come closer to the audience for a certain part of the speech.
Science Makes Sense Creationism 