https://techcrunch.com/2019/08/28/ahead-of-ftc-ruling-youtube-kids-is-getting-a-website/

Ahead of the official announcement of an FTC settlement which could force YouTube to direct under-13-year-old users to a separate experience for YouTube’s kid-friendly content, the company has quietly announced plans to launch its YouTube Kids service on the web. Previously, parents would have to download the YouTube Kids app to a mobile device in order to access the filtered version of YouTube.

By bringing YouTube Kids to the web, the company is prepared for the likely outcome of an FTC settlement which would require the company to implement an age-gate on its site, then redirect under-13-year-olds to a separate kid-friendly experience.