If you explain exactly what you want to do, and what the problem you're having doing it is, we might be able to help you.
Generally speaking, YouTube limits file uploads to 10 minutes duration for most users. Also, if you plan to post an entire Lady Gaga concert, it will breach copyright and be removed fairly quickly.
When you move your files to Windows Explorer, how many files are there and what size?
Many people post 1 or 2 songs per video clip and they have recorded the whole concert
How is the quality? your not one of those people with videos shaking all over the place? I hate those videos. the person knows they will be recording. Hold the video steady for God's sake.
I would suggest Camtasia Studio 7. You can edit the video. Im making a tutorial website Nd I could quickly make a tutorial on editing the videos into smaller video clips . . . As long as it isn't shaky video.
I made an example of how you would edit your video. Its easy. Camtasia Studio is offering version 8, which Im not familar with. I can give you a trial version of Camtasia 7, which I am familiar with.
I did this a bit quick. You may have to watch again.