anything on youtube over a hour long doesent function at all
Any video length is supported, however videos that were uploaded recently require some time in order to be available on the server. (generally a couple of hours)
Videos with copyrighted content (such as music videos or videos containing copyrighted music) are blocked by YouTube, unfortunately there's nothing we can do from our side about that.
And the full-length movies you usually see at the cinema are obviously not free on YouTube since they're sold and require to be bought.