Both actually, in editor and PIE in a new window, and packaged in game. I tried a few different apps but found Open Broadcaster Software (OBS) to work the best for what I need, and free! I guess shadowplay would work as well, I haven’t actually tried it yet, but I really like this app. It will output directly to mp4/flv, and it is GPU based screen capturing, doesn’t really affect the performance of the editor (unlike FRAPS). Plus it even allows multiple capture inputs, so I can overlay videos on top, or next to the main capture. It’s a really good program, basic, but powerful.
Thanks for the help though DemoMan!