First of all, you need a big server, because you need space for all those videos. Second, I don't know how could you design a movie maker by your self? it would be much easier to take license for a movie maker and use it. And third, it would be very hard doing it by your self, not because it is hard to make it but because you are going to give up after a while, so take a few friends or someone to work with you, it would be easier and much more fun.
The problem is you need to invest some money.
Alex