This video contains the production process and explanatory subtitles.
The Design making tutorial video starts at 00:10.
The image background and video on my channel are images that can be used 100% commercially, and I have personally edited 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 creates them by modifying and adapting 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.