
YT-Marker is an AI-powered tool designed to automatically generate timestamps and video chapters for YouTube videos. By simply inputting a video URL, users can have the AI analyze the video's transcript to identify topic breaks and key points, producing accurate timestamps that allow viewers to jump directly to specific moments. This service is particularly useful for content creators who want to enhance viewer engagement by adding timestamps to their video descriptions, as well as for students and viewers looking to streamline their learning and information-gathering processes from long video…
YT-Marker is a narrow, practical product: it turns YouTube video URLs into timestamps. It’s revenue-stage with paying customers and was founded in 2025 in Japan, so it’s an early commercial play rather than an experiment.
The numbers show a small but real business: recurring revenue exists, yet the 30‑day decline of -34% is the clearest signal of risk — either acquisition has slowed or churn rose. With low absolute revenue, the priority levers will be improving discovery and retention (e.g., tighter integration into creator workflows or distribution partnerships), or adding higher‑value features or plans to lift ARPU before scaling acquisition spend. Also note the product depends on YouTube URLs, so platform changes or API constraints are an operational dependency to watch.
A judgment from project data — not a user review.