My first thought would be to write about the shifts that have occurred and how they have even more potential for abuse as technology improves and audiences change, perhaps contrasted to the new channels opening up (Internet) and efforts to censor & control those.
For example, I experienced even in the 1980’s when I was part of a TV news story, that the media can and does edit its content to create a convincing succinct glimpse of what happened, that may reflect the actual event or might be quite different from what happened, but misses most of the detail and substance. A five-minute respectful yet challenging and interesting exchange got condensed to a one-liner question answered by “that’s a very good question!” making it look like the respondee had no good answer to a very basic question. That was accomplished by cherry-picking editing the exchange down to one fragment each. Upon further thought, it actually didn’t stray too far from the bottom-line, and it discarded a lot of dissembling and detail that a TV audience for a 60-second news story probably mostly wasn’t likely to hear, but that depended on an intelligent and fair editor to even get that much, and it seemed to make the government official responding look foolish in addition to the truth that I as the asker saw it (that there wasn’t really a good substantial answer to the question), and it left out the reasons why.
It seems to me that there have been massive shifts from then to now in the quality, intelligence level, integrity, professionalism, and impartiality of mainstream media, and that there is also a massive increase in the technical ability to manipulate media in new ways that many people probably don’t expect A) is possible nor B) “journalists” would do.
And the present and future of technology has even greater levels of video manipulation possible, including near-real-time fake or doctored talking heads and entire scenes.
The Internet offers new channels both for information and disinformation, which are already used by amateurs, audience, and professionals in both ways.