I think there are 3 issues around all this these days;
so-called citizen journalism whereby any idiot with a smart phone can take pictures or video of any 'event' and post it on-line for all to see without any thought of whether or not they have seen, captured and published the whole story,
the gullibility of much of the public in believing that any 30 second clip tells the whole story and their willingness to comment and further circulate it with additional comments based on, often, no actual facts whatsoever,
the reaction of 'proper' media outlets who seem to have given up doing actual research and investigation of events and choose instead to give further airings of suspect material on what should be reliable channels. Partly that is because they are all so keen to bring 'breaking' news to the public first and partly because the tv channels just have so much news time to fill when there isn't always that much actual reliable news to report.
The genie is out of the bottle and can't be put back on the first two, and I doubt that there is sufficient discipline in the media management to revert to saying "we will not publish until we have verified what has happened via bona fide responsible journalists and sources". Too many of the public, especially the young, have given up on mainstream media anyway.
I suspect we must learn to live in a world where there is a lot more 'information' and a lot less truth than once there was.