How do I make this ripped paper/vintage effect?
That is one awful tutorial.
Anyhow, print your graphic on a piece of paper, rip said paper, photograph or scan it. This will give the best result as far as the edge goes.
Alternatively, rip any piece of of paper, photograph it, use it as clipping masks and texture for your artwork. You'll want to offset the clipping mask from the edge so it has a better torn look, which again is why the first option is better.