The quality of the game is good.
The intro quality looks quite bad.
The PC screen quality looks bad.. but if you look at mine.. yours is even better
You could improve by ticking 'Maintain Aspect Ratio', that is if you use sony vegas.
It removes the black boxes around the video.
Doing so in that will improve the video quality and intro quality.
For the PC screen, you should hide all your icons, get a plain white wallpaper and record the whole screen.
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The Horizon capturing part would look a lot better, and it would probably look like the official XboxMB based Horizon videos..
If you wanted a rate.. it'll be 6/10.