According to rules of Youtube, the video that is to be uploaded can be
2.Up to 2 GB in size.
3.Up to 15 minutes in length.
4.A wide variety of formats.
When Fraps is used to record footage of game, more amount of HDD space is consumed as "Fraps doesn't support AVI 2.0 OpenDML extensions; so the maximum clip size is about 3.9GB."
To overcome this problem, the recorded video should be converted to other format to reduce the size of recorded video.
Use Any Video Converter 3.27, to convert the recorded video to other format.