Batman Unlimited, on DC Kids (YouTube)
DC Database; IMDb; Wikipedia; World's Finest; YouTube

This webseries began in 2015, but I didn't see it until 2017. It's a tie-in to a series of toys, as well as a series of direct-to-video movies. There is very little dialogue; so little it's kind of shocking that they even bothered hiring voice actors. Each episode is only a few minutes long (about one minute of which is taken up by the end credits), and the plot of each episode is told almost entirely by the visual action. In particular, Batman himself almost never says anything. Anyway, his current sidekick is Red Robin, but we often see other superheroes, such as Nightwing, Green Arrow, and Flash. And of course there are lots of villains for the heroes to fight. The first season has 22 episodes, and the second season has 11 episodes. And the latter are about a minute shorter than the season 1 episodes, because there are no end credits. Also, a lot of the season 2 episodes involve villains being much bigger than normal, for some reason. And then... there are more videos beyond season 2, but I don't think they're actually a third season. I just watched a couple of them, and while the first one seemed like it could be a self-contained story, after that I got a sense that they might just be clips from one of the movies. I'm not sure. Whenever I get around to watching the movies, I'll see if they include anything I saw here. Meanwhile, I'd say the first two seasons are reasonably entertaining, given their brevity.