It boosts your energy level
A study by Jessica Gall Myrick, a media researcher at Indiana University in Bloomington, found that participants reported feeling more energetic after watching cat-related videos. A study from the University of Nebraska-Lincoln found a correlation between humor — something often associated with the cute animal videos — and feelings of energy.

It increases positive emotions and decreases negative emotions
Respondents in Myrick’s study reported less negative emotions, including anxiety, annoyance, and sadness, following a cat-watching session. They noted that the pleasure they gained by watching cat videos seemed to outweigh any guilt they felt about procrastinating on tasks. Scientists have found that a “baby schema,” meaning large eyes, chubby cheeks, big foreheads, and generally rounded features, such as baby humans as well as kittens and puppies, tends to activate a smiling, positive effect and nurturing behavior. It also tends to give a dopamine rush to the brain similar to eating sugar. Oriana Aragon, a Yale psychologist, noted “Our survival depends on us taking care of our young. It’s part of our human species to respond to these features.”