Who can tell me some information about Alfred Hitchcock?

As a part of year 12 Drama, my group of 5 are to look at the styles of
Alfred hitchcock, and make a 12 minute video based on his
techniques... soo

Whats the best way to describe his genre?
Best examples to look at?

Some movie descriptions I've read have shown a pattern in the
storyline.. a almost supernatural or un-natural theme like pshycotic
people or fortune telling mixed in with a tradgedy or traumatic
event... would this be correct?

thankyou for your help