Yes, whenever you mark a movie or an episode as “to watch”, “watching” or “watched”, this gets published like a Mastodon post. You also have the option to automatically retoot this from your main Mastodon account. Others can follow you from Mastodon and react to your events. (For some reason, they don’t properly show up here, though.) And, of course, it all shows up for other users on NeoDB.