YouTube – How to Cut an Uploaded Video

With free desktop tools like BB FlashBack Express and Microsoft Expression Encoder Screen Capture, you can record whatever is running on your screen. While the video is running, you can start & stop at required portions.

With Expression Encoder SP2, you can overcome the 10-minute screen capture time limitation that was there earlier.

You can also use open-source tools like FFmpeg & recordMyDesktop to record video playing on the desktop.

It may take a while for the video to upload, especially if it has a large amount of data to cover.