You don't need a device, get nvidia and get shadowplay. If you don't already have nvidia just get obs. For simple cutting of footage I use vlc player to cut up reports on players and for editing I use sony vegas pro 11, you can easily get vegas from piratebay and it works perfectly. It can be confusing however and making simple montages for a forum where you will get roasted for it anyways. Just use movie maker, as long as you have good clips. You don't need any special editing program tbh,