When using Nvidia ShadowPlay to record gameplay clips, I often found that the video was getting saved with a resolution of 1280x720, even though ShadowPlay is configured to record at in game resolution, which in my case was 3440x1440 (Ultrawide resolution).
This is probably because when the game first starts, it opens a window with a smaller resolution, and then scales up to the native resolution.
The only fix to this that I could find was to stop ShadowPlay recording (Alt + Shift + F10) and then start it at which point, the recordings are in the current native resolution.
This is the recording after stopping and starting ShadowPlay.
