I forgot to mention that 'Statistics' also reports 'Average Value' in dB.
As I was thinking about VU I did a quick search and read wikipedia. I think VU meters report dB but the mechanics of the device cause it to be inaccurate in a helpful way, which may be what the TV folks are after.
Some of my preamps (Focusrite ISA428)have vu meters but they are way to slow to be of much help to me, but I enjoy watching them.
Here is a link that I found that is a free VU meter application.
http://www.vuplayer.com/other.php I didn't notice if they have an Apple version.
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