Why it worked
The video uses a popular format (tier list) and a trending topic (YC startups) to engage viewers. The creator's humorous and critical commentary on the startups, combined with the visual appeal of the tier list, likely contributed to its virality.
Summary
The creator reviews Y Combinator startups, starting with Ara, an autonomous software engineer, and ProjectX, a cloud GPU platform. They then discuss Drip, an AI meeting booking service, categorizing them on a tier list based on their perceived value and functionality.