What is the best topic to do youtube bloggin by creating youtube video with slide show?

Wel, Rambabu sir, am asking on what topic we can do vloging that means youtube blogging. Am not asking the process. 

From my own experience film and film related topics have the largest audience and travel blogs too attract a lot of viewers

Visit the Upload page on Youtube

Click Create under Photo Slide show

Upload Photos from your Computer

Drag and drop the Photos

https://www.google.co.in/search?q=How+to+create+youtube+Video+with+Slide+show+%3F&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&ei=aRxzV8zxBsKCoAOHj4GACQ