interesting problem library classes loading (IMPORTANT)

[eluser]InsiteFX[/eluser]
CodeIgniter only loads it's classes it does not know anything about your class Content_type
Same as your video class it does not know where to find your Content_type class.

You could try autoloading it first, but usally you just do like you are doing and include it in your video class.

If you search the forums you should be able to find the autoload that Phil wrote.