I just got a iPhone 7 and would I be able to record my phone screen it's iOS 10.3.3?

I just got a iPhone 7 and would I be able to record my phone screen it's iOS 10.3.3? - 1

No, just wait a few days for iOS 11 and that will have that function built in. There was an app for recording on iOS 9 but it got taken down.

No I think that is only a feature only for iOS 11.

Press and hold the Power button and click the Home button at the same time