Does the external camera induce extra-visual artifacts, or does it show exactly what you see?
One think is for sure, you will not get a satisfying experience with your table/laptop hybrid. I've read in a French review that the screen is badly handled, so I am not sure this can be solved by adjusting X-plane settings.
That being said, your computer just meets the minimum required hardware specifications :
BUT, your 13.3" screen has a HUGE amount of pixels : 3300x1800
Of course, all your graphic settings should be at the minimum, and you should try a HD resolution (1024x780) or similar. You could also try a window mode, and adjust the window size so that it only covers a third of your screen.
Make sure your video card driver is up to date.
If this doesn't help, maybe the problem has already been reported by other owners of this laptop, with other softwares, and there is a chance you can find the answer on other forums.
To finish with, a video you might be interested to watch, made by someone who specifically sells computers for X-plane :
Guillaume AMELINE (not affiliated with Laminar Research or any other company)