What I am going to say is my personal opinion. I think it doesnot work like and request to disseminate your work, and I know some people do that, however, I think it is cliche. I am working for a podcasting since few months ago where we conduct a podcasting about their work and writing article and what happens that we are tracking the updates of the researchers in the field and see whether the did something great, so we have a podcasting.
In my master, I have attended science fair and there was a journalist from a magazine asked to report about my work and interview.
However, I think if you are going to appear in media/radio station I think that case that your is recognized and deserve to disseminated and the exceptional work will speak about itself.
However, we have a similar cases while few researchers tends to hype things and go to media and by the end we discover that they lie or overestimate what they did.
So, from my humble experience, the good researcher shouldnot seek for disseminating their work by asking TV/Media for instance, you can do that on youtube through telling people what you have done, conferences, this is your tools and you have the right.
In the other side, if your work really interesting, journalist passionate science and technology definitely will approach if you have authentic and original research.