Im making free 10-minute study guides on youtube for GCSEs and was wondering what you guys want to see the most

Hi everyone, I think a lot of the current GCSE material is bloated and demotivating to study from. I think I can make videos covering chapters wholly in 10 minutes or less per chapter.

I was wondering which subject you guys think would be the most beneficial to start with, and additionally on whether you're more interested in videos solving papers, or videos teaching material.