Just to record if you have a later NVidia GPU you have the built-in hardware recording which you can access using Geforce experience.
Then you can start and recording using alt+F9 etc. Windows 10 lets to edit a video in a basic form from within the photos media player, or you can buy a movie editor to do more cool clips merging etc.
(such as Vegas Movie studio etc).
Fraps is simple to use but as far as I can tell no longer supported for updates etc.