Tell us about yourself!
For video quality any smartphone that records over 720p is great. A camera is better, of course, but you can do a lot usingonly a smartphone. The audio is a bit more complitcated. It depends on how much you want to spend, but you should keep in mind that you want to buy a condenser microphone. The best cost efficiency I've seen so far is the audio technica AT2020, which costs about $100 and has an amazing quality. Another good option for a better price is the blue snowball, which costs about $50.