I will be interning on the set of a music video in July. Is this something that I can put on my college application?

Absolutely! This is a great opportunity for you and basically any time you are doing something productive toward your career and your passions/interests, that is something the colleges like to read about. Also, this activity stands out from the ordinary because you are a high school student who is doing something very hands-on with real-world experience. I think this is awesome and that you should even consider writing your main college essay about it, if it turns out to be an experience you really enjoy!