How come when Fox claims that from msnbc someone said something?

They do not show a video of that someone like msnbc shows a video of them when they say something stupid? Today Hannity said that Mathews said during the Hardball show but he did not prove it be showng the video. I think the faux journalists of faux news are just liars to me. Unless they start showing videos of people saying what they say they say I will not believe them.