I know It's one feature of iphone 5s, but can iPhone 5 do it? or can you record 60fps or 120fps with iphone 5?
Slow motion video is not available on models below iPhone 5s with stock software. There are camera apps that simulate it, but the hardware in iPhone 5 is apparently not physically capable of going above 60 FPS.
It is possible on jailbroken devices to unlock this 60 FPS mode, or at least it was as of iOS 7 (a few years ago).