The video includes the production process and explanatory subtitles.
The Design making tutorial video starts at 03:29.

My channel's image wallpaper and video clips
It is a second process and design of images that are 100% commercially available.

I used Adobe Photoshop, Illustration, After Effect, and Premiere.
We're going to make a video.

In the case of secondary creations that added new creativity to the original work in the Blue Rain channel,
It is being modified and adapted through sound sources and videos that have canceled the license.
This falls within the scope of 'fair use' and does not violate copyright law.