The Impact of Short Videos on Cognitive Costs

There is an ongoing debate across academia and the industry over whether the prevalence of short videos has lowered the public’s cognitive costs or conversely raised the threshold for meaningful cognitive engagement.

From the perspective of information acquisition efficiency, short videos have drastically cut cognitive costs for general knowledge and news-related content. Users can absorb information across diverse fields during fragmented downtime: commuters in the morning can quickly grasp iterative trends in power battery technology for new energy vehicles; lunch breaks allow them to unpack the core logic behind commercial disputes involving leading AI enterprises; content browsed before bedtime delivers simultaneous updates on equity fund performance and public policy statements from global political leaders.

Furthermore, short videos have significantly lowered barriers to accessing public livelihood information. Previously, details such as adjustments to compulsory education enrollment policies, local infrastructure construction plans, and cross-provincial off-site medical insurance reimbursement procedures required in-person visits and multi-department consultations to confirm. Today, short video content can rapidly provide accurate step-by-step guidance on these matters. For cognitive demands that only require basic awareness, short videos distribute information far more efficiently than traditional graphic articles or offline consultations, delivering an unambiguous reduction in cognitive costs.

That said, it is critical to distinguish two fundamentally distinct types of cognitive demand: shallow cognition and in-depth cognition follow entirely different acquisition logics.

Short videos hold irreplaceable efficiency advantages for shallow cognition that merely requires information synchronization. Needs such as gathering talking points for social interactions or scanning early signals of emerging technologies and policy shifts for industry practitioners can be efficiently satisfied by short videos’ highly condensed information density. Even corporate executives and professional investors leverage short videos as a monitoring tool for industry developments to quickly capture cutting-edge market signals.

A widespread cognitive fallacy, however, equates “information exposure” with “complete comprehension,” blurring the line between shallow and in-depth cognition.

This confusion is especially prominent in highly specialized fields, where an enormous gap separates merely “understanding basic principles” and possessing practical implementation capabilities. In real-world practice, condensed takeaways from short videos almost exclusively cover universal logic under idealized scenarios and fail to account for complex variables inherent to real situations. For such fields, fragmented information intake marks only the starting point of learning, never the finish line.

A typical example: after watching a handful of videos dissecting corporate strategies, viewers may mistakenly believe their decision-making competence matches that of seasoned business leaders; after consuming several industry investment analyses, they may feel fully equipped to judge industrial trends. Yet rigorous professional decision-making cannot be built solely on fragmented snippets. It relies on structured analytical frameworks, trade-offs between risks and returns amid incomplete information, and dynamic alignment of organizational capabilities, resource endowments and market windows. Such in-depth cognitive content is characterized by rigorous logic and low sensory stimulation — qualities ill-suited to the 3-minute runtime limit of short videos, which struggle to sustain ordinary viewers’ attention.

It is at this layer that short videos actually drive up the overall cost of in-depth cognition.

Under traditional information-gathering models, individuals maintained clear awareness of their own knowledge gaps. Upon identifying blind spots in a given field, they would proactively pursue in-depth learning via expert consultations, professional research reports or field investigations. Today, countless users are misled by a “cognitive illusion” crafted from fragmented clips, falsely believing they possess sound professional judgment. Even users who understand how cognition truly works must first bear extra costs to dismantle this misleading illusion before embarking on serious, deep learning. This process of disillusionment represents an entirely new cognitive burden brought about by the proliferation of short videos.

More alarmingly, many users rely entirely on fragmented short-video information to make high-stakes decisions, drastically increasing trial-and-error costs with often irreversible consequences. Examples include unauthorized demolition of load-bearing building walls after watching renovation short videos, administering untested medications to children based on unqualified parenting content, or investing all household savings in high-risk assets following advice from unlicensed financial bloggers. The adverse outcomes of such choices can rarely be fully reversed through post-hoc adjustments.

Mastery of any professional skill demands long-term accumulation, and the format of short videos cannot support systematic capability building. Professional expertise consists of dense experience forged over years of practice, tacit insights accumulated through countless trials and errors, and structured decision-making frameworks for navigating uncertainty. A three-minute short video can introduce basic definitions within a field, yet core insights such as how to judge risk boundaries, select decision windows and build fault-tolerance mechanisms reside only within complete knowledge systems. The production logic of fragmented content inherently filters out these low-stimulation yet critical takeaways.

The proper way to utilize short videos is as a tool for expanding the boundaries of one’s knowledge. Cutting-edge signals including demonstrations of emerging technology principles, consumption trends in lower-tier markets, and transferable cross-industry operational tactics frequently first appear in short videos created by vertical niche creators. Viewers may treat this content as entry points for inquiry, then build thorough comprehension by reviewing academic literature, consulting industry specialists and running small-scale pilot verifications. Simply put: short videos broaden the scope of cognition, but cannot define its depth or accuracy.