Sorry you don't have access to this video
Using Juilliard Masterworks to stimulate creativity: Ages 13-14. Part 1
...
Introducing consonant and dissonant harmony.
Using a few seconds from Juilliard core work 'The Rite of Spring', Rachael Howarth, from BIS Bratislava explains how to add either consonant or dissonant harmony to a melody.