I used a phone camera for a music video [will post link here soon], for a film course, and it costs me exactly $0.00. It was kind of expensive, but it was worth making it because I got experience with Final Cut Pro X. Really cool but hardware-intensive piece of software. You'd be surprised what you can do with very little. And as my cousin, who is a professional camera-man said, "DIY music videos have a STRENGTH to them that pro videos never have!"