Here are some suggestions of video tutorials I’ve come across that can help your book cover come together.
Unruly Guides is a fantastic resource for self publishers who want to DIY.
This video is a basic Photoshop tutorial for designing a book cover:
Design Like A Pro have a good InDesign tutorial about laying out a template. InDesign is what’s used by professionals when putting together a book cover, however it can be tricky to get a handle on if you’re used to the way Photoshop works. Still it’s worth giving it a try. I’m dedicated to InDesign!
The number of quality video design tutorials out there is a lot less than I expected but this is a start. Do you have any video tutorials you can add?