Well, you came to the right place. Holo no Graffiti is a series of short ONAs starring the idols of Hololive, uploaded to the official Hololive YouTube channel about once a week.
There isn’t much continuous story, and the art style is literally the idol’s 3D models animated and voice acted by the idols themselves. However, each episode is short enough to tell a short, comedic story centered around 3 to 8 of the idols, usually taking place in a CG version of the Hololive office. Overall, 10/10, I can’t think of any downsides.
