Watching short videos is associated with decreased cognitive function and increased stress

Services that allow users to watch short videos of just a few tens of seconds, such as YouTube Shorts and TikTok, are gaining popularity, but it is also known that watching short videos can have negative effects, such as a decline in academic performance.A new study, which comprehensively analyzed the results of multiple experiments, has shown that watching short videos is associated with a decline in cognitive function.

Feeds, Feelings, and Focus: A Systematic Review and Meta-Analysis Examining the Cognitive and Mental Health Correlates of Short-Form Video Use
https://psycnet.apa.org/fulltext/2026-89350-001.html

Several studies have been conducted on the impact of short videos, and in January 2025, a Chinese research team published research results showing that children who spend more time using short video playback apps have lower academic performance.

Research shows that children who spend more time watching short video apps like TikTok perform worse in school - GIGAZINE

A research team from Griffith University in Australia recently conducted a comprehensive analysis of 71 short video-related studies, examining the impact of short videos on people, with a total of 98,299 participants.

The analysis revealed that use of short video apps was associated with poorer cognitive function, particularly reduced attention and impulse control. It was also strongly associated with poorer mental health, including increased stress and anxiety. These associations were observed regardless of app type, and were seen in both adolescents and adults.

However, no correlation was found with body image or self-esteem. The research team stated, 'Short video apps offer a wide variety of content created by a wide range of creators, so it is likely that they did not affect body image or self-esteem.'

Based on the results of this analysis, the research team pointed out that 'considering the potential for short videos to permeate daily life and affect health and life, it is important to understand the health effects of short videos,' and argued that further research is needed to clarify the effects of short videos.