Earlier quoted context omitted.
You could have said the same thing about Photoshop. Journalism is as good as the integrity of the source. In places, you could argue that's systematically eroding. I don't think you can argue that fake videos are what will bring it down.
Journalism is as good as ever. It's easier than ever before to gather facts and verify sources. The problems faced are external to journalism: a losing business model, and government saying that journalists aren't trustworthy. But the integrity of the press is fine. There are less yellow outfits than there were a century ago, even.
It used to be you had to have two independent sources before you took an individual source's word. Now rumor becomes newsworthy --it's like the Enquirer won.
They are also owned by big cos (Amazon, Conde Nast, Carlos Slim, Murdock, etc.) and have very clear biases. NOt that biases didn't exist before (Hearst papers) but on day to day stuff they played it pretty level. Now, they go for the incendiary whereas before they were focused on big issues --the issues that mattered to society at large rather than smaller divisive issues. But divisiveness gets you clicks.