"Bought Because Even Doctors Use It"…The Real Reason 15-Second Videos Trigger Sell-Out Frenzies [How We Shop Now]

Hot Picks and Recommended Items Go Viral in Short-Form Content on Social Media

Scarcity, Value-for-Money, and FOMO Fuel Dopamine-Driven Purchases

Retailers Go All-In on "Algorithm Marketing" for Survival

Editor's NoteWhat are people buying these days? From must-have household items at Daiso to cosmetics that regularly sell out at Olive Young, and even breads that people line up for. The scenes of everyday consumption perfectly reflect the current trends in the market. 〈How We Shop Now〉 is a series that explores today's consumer trends by looking at “the best-sellers” in our daily lives. It explains in a simple and engaging way why certain products are chosen, and what strategies make people open their wallets—breaking down the latest changes on the consumer front.

An image generated by artificial intelligence (AI) to aid in the understanding of the article. Gemini

"If you see this, just buy it!","A product even doctors stock up on","You need to head there right now..."

Friday afternoon, July 31. Every customer at an Olive Young store in Seoul held a smartphone in their hand. On their screens, 15-second short-form videos with captions like "Summer Essentials" and "Must-Have Life Items" played rapidly. As short-form videos become a new standard for consumption, an era where algorithms determine sales has become reality.

"Because a YouTuber recommended it"…How short-form content is changing shopping scenes

"I came to buy this right away because beauty YouTuber ○○ Unnie recommended it."

On that day, a university student surnamed Kim (22) searching for a specific product asked a staff member at an Olive Young store in Seoul. She laughed, saying, "The video said 'buy before it's out of stock,' which made me feel the pressure to hurry." In fact, the product Kim was looking for was already sold out at the store.

The video Kim showed was a 15-second "Olive Young Sale Must-Buy Recommendations" clip on YouTube Shorts with millions of views. Kim said, "Nowadays, I catch trends first through short-form videos. Since they show the real color, texture, and usage so directly, I end up adding whatever shows up in the video straight to my shopping cart without much thought."

Thumbnail of a YouTube Shorts video recommending Daiso products. Screenshot from YouTube.

"People buy things they don't even need"—Discovery-based consumption and dopamine, FOMO triggers

Experts interpret this as the spread of "discovery-based consumption." Instead of recognizing a need and searching for a product, consumers develop the desire to buy while watching content.

Short-form videos compress the usage scene, effects, and price, quickly leading to purchase decisions. Especially among Millennials & Gen Z, the tendency to trust "recommendations" over "searches" is growing stronger, making this trend more pronounced.

Experts cite dopamine stimulation and fear of missing out (FOMO) as the main causes of this phenomenon. Short and impactful videos provide an instant high, and combined with messages like "cheap but effective" and "buy it now or miss out," create a sense of urgency that drives purchases. In this process, consumption is increasingly driven by "stimulus" rather than "need," and the lower the price burden, the stronger this pattern becomes.

The "sold-out craze" driven by algorithms

Industry insiders are already feeling the change. A staff member at an Olive Young store in Seoul said, "Whenever a certain product goes viral on social media, sales often jump in a single day. Especially products that short-form videos highlight as 'cost-effective' or as providing 'instant results' sell out quickly."

YouTube Shorts video thumbnail recommending Olive Young products. YouTube capture.

The situation is similar at Daiso, the household goods store. According to one staff member, "In the past, shoppers would look around the aisles, but now, more than half our customers show us screenshots from short-form videos on their smartphones as they ask where to find specific items. Organization and beauty products that trend on short-form videos frequently sell out the same day they're stocked."

The fierce competition for "algorithm-friendly" retail

As a result, the industry is now changing its strategies. Companies are especially focused on developing products that can spread easily on short-form platforms, emphasizing instant results, visually striking textures, and features that stand out in short videos as key competitive elements.

Instagram content recommending Daiso products. Instagram capture

An industry insider observed, "No matter how good a product is, if it doesn't make it onto short-form algorithms, it's hard to get chosen by consumers now. The competition in 'algorithm marketing'—where strong, punchy visuals prompt immediate purchases—is only going to get more intense."

Impulse buying vs. a new rationality

An image generated by artificial intelligence (AI) to aid in understanding the article. ChatGPT

This new form of consumption has sparked concerns about encouraging impulse purchases. Critics point out that repetitively viewed content in short spans can overstimulate shoppers' desire to buy. However, some argue that the high view counts and numerous user reviews function as a kind of verification, allowing short-form-driven consumption to be seen as a fast and reasonable decision-making process in its own right.

This content was produced with the assistance of AI translation services.