There are plenty of voice calls in the video that are >exact< quotes from the movie, but they are done with a voice actor and therefore don't sound as good. Such as "Here Scarecrow, wanna play ball!?" and "I am the great and powerful Oz!" and "Are you a good witch or a bad witch?" and "Just follow the yellow brick road."
These would be so much better if they were the actual sound clips from the iconic movie. Any Oz fan is going to know these are not original.
Since none of the voices sound original, I am guessing that they did not get the license for any of them and unfortunately had to use voice actors for everything.