You've watched dozens of YouTube videos about screen printing, yet you still can't figure it out. It's not your fault. The problem is that you can't learn to screen print from a quick overview of the process.
You watch our 40 second video and it's a a parody. Making it 20 times that long won't fix it much.
When I teach people to screen print I spend lots of time explaining things like "How to Pull a Squeegee," What is the Basic Concept of a Screen?, different ways to create films, and a huge swath of other detailed bits that help you get from concept to end product.
You don't need one skill or one lesson to learn screen printing, you need a bunch of skills, concepts, and a series of tutorials designed to go together.
go to http://www.redalertgear.com/howto