High School Musical was filmed at East High School located in Salt Lake City.
![East High School](https://i.ytimg.com/vi/CoE4ZqY2g2Y/maxresdefault.jpg)
Most of the Disney Channel film High School Musical was filmed at East.
The opening scenes of its first sequel High School Musical 2 (including the film's opening number, "What Time Is It?") were also filmed at East High.
I guess is what you are questioning.