As far as I know, making a program that actually records a vid clips would be like making a small game itself. It's probably no easy task.
Just get trial version of fraps or something since it's free.
I don't say this to be rude, but it's a complete waste of time in my eyes.
Set up fraps once and most of the time you never really have to diddle with it again, just run the fraps icon on your desktop, and it will automaticly be able to record from the game, even if you started the game first.
Pros
-Easier for anyone to make a video
Cons
-Would take time to make if even possible in a good way when there's probably other more needed things to work on
-The quality would most likely not reach the same standards as recording it the other way
-Might need permission to make a youtube uploader? And if not, it would just really bring you to the upload page of youtube, this means it would be a raw video file unless you edit it anyway
-The only time I've bumped into an ingame video uploader was from the game "Dirt3"(A game made by a professional studio), and even there it was horrible.
So this idea is not something I really support xd