Why does artist #302790 include three different people?

I noticed that artist #302790 includes three individuals, and I'm confused about why this is the case.

1.hamilundenongdizhe(哈米伦的弄笛者): As far as I know, he is not an illustrator but a doujin video creator. I assume this tag was created because someone uploaded images from his bilibili post, but these images should actually be tagged as second-party source

2.xiazhijunx2one(夏至君x2one): An illustrator who occasionally participates in hamilundenongdizhe's doujin videos as one of the artists

3.amberkaki(琥珀kaki): same as 2

Some videos such as post #9540400 are uploaded. What sort of involvement does 哈米伦的弄笛者 have in the videos themselves?

tamuraakemi said:

Some videos such as post #9540400 are uploaded. What sort of involvement does 哈米伦的弄笛者 have in the videos themselves?

He is the main planner of the video

哈米伦的弄笛者 takes on the role of main planner and director in all of his doujin video

Not sure on the videos then but the images should be split off if he wasn't involved in making them. Is there a clear indicator of who made what image?