This post appears in this bilibili post by weimu vmovie regarding a music video for a song from Honkai 3. In this associated post, they say:

这次我们负责了整个视频的原画和后期制作！

which Google translates as "This time we are responsible for the original painting and post-production of the entire video!" (emphasis added), and another site seems to corroborate that translation.

On that basis, tagging this as weimu vmovie.