The reason Zoom calls drain your energy

• Video calls require more focus than face-to-face chatting. We have to pay more attention to process the non-verbal cues like tone, pitch, body language and facial expressions. There is also a feeling of dissonance when the minds are together but the bodies are physically apart.
• One finds it harder to relax in a conversation, as even a slight delay (silence) makes us feel that the other person is not friendly or focused enough. 

Video Calling is being used for studying, dating, talking to your parents and for work purposes, leading to a new kind of exhaustion of doing everything from your laptop or smartphone screen. Add to this our being confined in a tiny space (like a room) most of the time.