Hi Stu,
The suggestions already made are good for a start, and might fill your needs.
If you find that you need to do more in the way of compositing and menu creation, I can recommend Sony Vegas Movie Studio. It is more stable, capable, and somewhat easier to use than Pinnacle Studio.
It does NTSC/PAL conversion and, given your account information, will format and upload to YouTube.
Regards,
Marty