The thing is for a long time TV stuff used to be produced, aired and then it was gone.

Some things also were saved, onto the video rolls of the time, which at some point randomly begins to deteriorate into Vinegar and other stuff, the vinegar stinks and breaks apart the remaining parts of the roll.

Also some poeple saved the episodes on their VHS at home, however the next week it would just overwritten again with new content.

So basically it is a wonder that there even are that many episodes and it was a giant community effort mostly to gather those we have.

Or maybe I'm just speaking out of my ass, but this is the internet, how would you know?