I'm pretty sure you can. I believe the terms of service were on VroidHub's website. Whether or not you can use an individual model and whether or not you have to credit the author is listed on the page of the individual model as set by the author.

If you just use VRoid Studio and make the models entirely yourself then use them, that's perfectly fine.

https://policies.pixiv.net/en.html#vroidhub

Thanks for the answer!
I'll give a good look th that page.

the master terms of use arent very useful here. and vroid hub is actually a different service from pixiv and has its own terms of use. the master tos just say the guidelines and terms of use apply. basically the link above tells you to look around here https://vroid.com/en/studio/guidelines
but the answer is pretty much: it depends on what your model consists of

but your question actually is not directly related to vroid but the software youre using. if you for example use MMD or VRM Live Viewer then you must absolutely list and credit all your sources. model, stage, effects, song, motion, etc etc.
you should never just post a dance video without credit unless you created all from scratch (motions, expressions, camera motion, music, stage, effects, etc) but even if you make all of that you still have to credit the software you used to make them dance and need obs or unity motion capture to record a video. you dont get around crediting in that regard really.

so the easiest rule of thumb is
should you credit your sources: yes.
even if its not explicitly required its always appreciated.
just imagine you actually do make a video and someone downloads that to remix it and reupload it without any source where it came from and people have no chance of finding your original video anymore while the remix gets clicks and views.