This page contains excellent turorial versions of the 42 Form (Competition Form) with demonstrations of the 1st and 2nd sections by Miss Ng Ah Mui:
Tai Chi 42 Forms Part 1 - Teach
Tai Chi 42 Forms Part 1 - Demo
Tai Chi 42 Forms Part 2 - Teach
Tai Chi 42 Forms Part 2 - Demo
Tai Chi 42 Forms Part 3 - Teach
Tai Chi 42 Forms Part 3 - Demo
Tai Chi 42 Forms Part 4 - Teach
Tai Chi 42 Forms Part 4 - Demo
Tai Chi 42 Forms Parts 1 to 4 - Demo