Ddey, If you wish to post the additional views in comments, you are welcome to do that.

http://www.imcdb.org/vehicle_151788-International-S-1800.html

Okay, now I've got images, as poor quality as they are;



And now I think this is either an S-1600 or S-1800. Maybe this scene might help;


It didn't, but I saw a clearer view on TV and found it was an S-1800.

Here's another shot of the back of the school bus. Maybe somebody can identify the manufacturer, if the guitar player isn't in the way.



Other than that, there are no vehicles, unless you count bicycles and skateboards. There is a Yamaha in this video, but it's a drum set.

I could make a screengrab of this, but I don't have time for it right now. So allow me to just post the link to the video for the Miley Cyrus song "Start All Over":

http://www.youtube.com/watch?v=m-jRHI3INyg

and to report that the school bus is an International Harvester S-Series, possibly an S-1700.