Why can't I View Campaign in Theater

So I wanted to get some clips of a few new assasinations we saw in Campaign and in Spartan Ops to show to other folks I play with regularly but there’s no way to view campaign or spartan ops in theater. Are we planning on making this available in the future or is this one of those things that 343 has decided we didn’t need any more? Why would you remove something so many player enjoyed using in the last 3 versions of the game? Please don’t take this as a complaint, I love the game. I just expected certain aspects to remain the same… you know the parts that weren’t broken before.