First up for me is Mr H and H who has done a number of animations for clips of vtubers for many companies and indies, including some on commission. Such clips as Henya, Pippa, and Tenma having a conversation about the seaside, Kronii's impressive padoru and Kobo and Zeta wishing Kaela a happy birthday.

Then we have Ebihurai(EN here), who does japanese hololive animations with adorable kid-like versions of the girls - mostly in relation to Botan, and Nene. Here is a 2023 compilation~

And finally for animations, here's a quick Kronii Karaoke Fail from Tripl3, who's done many others as well~

And for clips...I'll just drop this one here Trickywi versus her chat's sound redeem timing for lack of being able to choose any in particular~

Edit to add: And here's an extra! SuperAppleMan asking the big questions What's the fox say? with Fuwamoco~