Not sure what kind of youtube videos you mean, so I think maybe people who respond to this thread should maybe add a short description of what kind of videos they make (vlogs, gameplay vids, fanvids, etc?) After all different types of vids require different types of software to be made
I make fanvids myself, and I primarily use Corel Video Studio 12 to do my editing, sometimes, if my sourcefiles are mkv, I will use MediaConverter8 to convert the parts that I want to use to video formats that VS accepts.
Here's my latest creation for those interested:
[video=youtube;6YjRwcbXeDA]https://www.youtube.com/watch?v=6YjRwcbXeDA[/video]