Welcome to 3blue1brown!  The main event is, of course, the YouTube channel, which is probably the best place to explore existing videos, including the most recent uploads, ones I'd recommend, and the various "Essence of" series.  This site is mainly just a hub to point people towards various peripheral aspects of the channel, like the Patreon page, store, and FAQ page, as well as any other projects that might come up, like the podcast.