Is there anyway to watch multi-parted YouTube videos in one?

Hi all,

I was wondering if any of you had any suggestions regarding this?  I have come across the occasional YouTube video that was over an hour long, but most YouTube vidoes I have interest in are only in 10 minute segments (or there abouts).  That is annoying when I am watching them from bed (where I keep my computer).

Does anyone have any suggestions of what to do?  Maybe there are other links or utilities?  Could I download the separate segments and piece them together somehow?

Many thanks for your help!

Jon