This video includes the production process and explanatory subtitles.
The Design making tutorial video starts at 03:10.

The image backgrounds and videos on my channel are images that can be used 100% commercially, and I personally processed and designed them.

I use Adobe Photoshop, Illustrator, After Effects, and Premiere to create videos.

In the case of secondary creations that add new creativity to the original work, the Blue Rain channel modifies and adapts them using music and videos that have been released from the license. This falls within the scope of 'fair use' and does not violate copyright law.