YC provides a built-in go-to-market engine where startups treat their 200+ well-funded batchmates as their first customers. This 'win YC, win the market' strategy de-risks early customer acquisition and provides critical initial revenue and case studies to build momentum.

Creator marketing's impact extends beyond direct platform metrics. A viral video builds 'mental real estate' and top-of-funnel awareness, leading to a measurable spike in branded search queries on platforms like Google and even e-commerce marketplaces like Amazon. This creates a powerful, albeit hard-to-quantify, discovery flywheel.

The strategy scales from individual sponsored videos to having 100+ creators on retainer posting monthly. This creates an "astro turf" of content that dominates the niche's ecosystem. A successful video can then go viral, prompting other creators to organically make videos about your product to capture views.

The founder of Shure notes an escalating trend in YC launch video quality. He advises founders to invest heavily in production, as the distribution from YC's channels is powerful enough to generate a startup's entire inbound lead flow for months, making it a high-ROI activity.

While platforms like X generate high view counts, a small, niche YouTube channel builds significantly more trust and drives higher conversion rates for B2B SaaS. Local Rank's launch video got 1/10th the views of its X post but drove 80% of sales. Even unpolished Loom videos can be highly effective.

To de-risk their unconventional idea, Liquid Death created a fake ad and a Facebook page to test market reception. They secured millions of views and 80,000 followers, proving demand and generating traction that was crucial for raising capital, turning a concept into an investable business.

Gamma's AI launch succeeded not just because of the product, but because they intentionally crafted a "spicy" and provocative tweet designed to spark debate. This drew engagement from influential figures like Paul Graham, massively amplifying their reach beyond what a standard announcement could achieve.

Instead of building a full app, creating a compelling video of a unique UI/UX concept and posting it on social media can validate demand. For a calorie tracking app in a saturated market, a viral video showcasing a novel interaction pattern generated an 800-person waitlist, proving product-market fit before significant development.

The founder of Stormy AI attracted the attention of YC's CEO by creating and sharing viral demos of local language models on Twitter. Instead of a cold application, his public building and social media presence led directly to an invitation to apply, highlighting a powerful, non-traditional path into top accelerators.