Ytboob.

: Many artists now document their entire journey of designing their own book covers using tools like Procreate and Photoshop, turning the "behind-the-scenes" process into a genre of entertainment itself.

The keyword appears to be a portmanteau, blending "YT" (the common abbreviation for YouTube) with the slang term "boob." In the digital age, such blended terms are frequently used in two ways: ytboob.