Content disappeared

Is there a place or a way to find out when content will be taken down?

I just went to watch Justice League Doom, and it’s gone. And older episodes of the daily series aren’t there either. I like to watch things in order, but this makes it impossible. Anyone know?

I know in the Watchtower section they list upcoming content, not sure about removal though.

I though i read somewhere you can just download them for offline view. Thats what ive done with the comics i like reading. havent tried it with films