It's obviously a feedback loop where one influences the other to some degree, but I do think the media can cause a change in attitude. If these channels weren't publishing clips like the above then I think their viewers wouldn't have as negative an opinion of some of the topics being covered.
I think the reaction to Jaguar's ad didn't need any media prompting as it could spread through social media. The media will capitalise on existing interest.
Can the media try and fail to make things happen? Vast swathes of the media across the political spectrum tried to inflame passions over the acquittal of a police marksman a few weeks ago, but it didn't seem to catch with any of the public, so then they gave up on it. The media can also act in a very coordinated way and meet with diminishing returns e.g. Democrat election daily pushes.
I think their message has to chime with what people are feeling. By analogy, I organised events for a while and I could push an event til the cows come home but it wouldn't catch on unless there was a genuine interest; if there was interest all I needed was 10% of the marketing push and the thing would fly of its own accord.
Now, my caveat is longer term persuasion of those with whom a media provider has already chimed e.g. when people buy a paper they're then looking for guidance and sometimes it gets a bit silly e.g. Times 2 ran with 'Christmas parties: what to say, eat and wear', but I think if the media manipulates too hard then the connection is lost.