The lesson
Prove each capability by performing it on screen, using the claim itself as the text being edited.
A purple opener builds "The new era of" with "new era" in a white pill, then lands on "AI Presentations" with a Pitch Agent label. Later shots zoom on a yellow slide where the cursor selects "Fully editable." and clicks bold in a floating toolbar. Another shot shows a prompt box reading "Replace this with a photo".
The purple gradient and pill treatment are Pitch's. Keep the idea of choosing the on-screen text so the action proves the sentence, and keep each shot to one visible gesture.