News stations shouldn't be allowed to report anything related to science at all. They have no clue.
The salt water isn't burning, the oxygen and hydrogen created from breaking down the water is burning. And to break down the water, you notice how he puts it into this big machine generating radio waves? Where's that being powered from? Maybe a wall socket?
So they plug in a huge radio wave generator, split the water, burn the result, and power a tiny Stirling engine. They could have plugged in an electric motor directly and it would be far more efficient.
If you split water, then burn the resulting components, you end up with less energy than you started with, there's no way around that.
At best this could be a better way to get hydrogen from water, but that's unlikely. If he truly had something he'd just test how much energy it took to create a specific amount of hydrogen this way, and with electrolysis, and if his way is better he'd be rich instantly.