Why is it you can watch some full length programs on youtube but not others?

Question

e.g. you can watch whole episodes of peep show but not the simpsons - why is this?

Answer 1

Because no one put the program you wanted to watch on you tube yet.

Answer 2

People upload videos to You-tube, so if a program is not on You-tube it means one of two things:

that someone has not uploaded it yet

or that the video has been removed. normally due to copyright infringements

Answer 3

Because they haven't all been Uploaded on the Site.

Or the show makers have taken them of,..cause it's a Copyrighted show,..and they have the Right to remove them.