Just walk through the crowd with a wireless mic and make them pan to you.
What else could they do? Keep the cameras on an empty podium? Way to obvious and people would turn the channel.
Simple elegant solution.
And then when you get back to the stage say...
“Well since they refused to cover the crowd on their own like a good journalist would, I made them. And in the future if they cut to commercial when I do it, you should cut them from your television in response in favor of an outlet that WILL do their job with honesty and integrity.
Or better still, follow me online and put traditional propaganda outlets out of business.”
Especially one who's been publicly threatened by multi-billion dollar drug cartel kingpins who've now put out a bounty on Trumps head.
Not to mention all the big dollar insiders who'd like to see him go away quickly by any means possible. ☺