The human brain has a hardwired system for recognising and interpreting human faces, body language and emotion. When we see a human face, we automatically activate our mirror neuron system — we empathise, we recognise, we trust or distrust.
Paul Ekman identified seven basic emotions that are universally recognisable across cultures, languages and ages. Video can trigger them all — but only through humans. A product cannot express emotion. A person can.
The most effective marketing video shows people having a real experience in relation to a product or brand. Not actors performing a script, but people reacting authentically.