Delivering for a Broadcaster

If you check the box that says 'force fixed length GOP' you may get some choice(s). I don't have your version of CC so I can't check it out.

Group Of Pictures ( GOP), as you know, refers to compressed codec 'range' between specifically targeted frames that are completely mapped per pixel exactly rather than 'guessing' by the algorithm and throwing away specific pixel / location data that haven't changed frame by frame. That gets the compression routine back to REAL frame reality re: pixels and locations and values ..

I think normally 12 is cool for N frames …

Group of pictures - Wikipedia

Your codec choice probably has this 'built into it' but you can probably change it checking that box, I have no clue. Sorry.

The color space is probably rec 709 gamma 2.4 that they want. From what I hear PPro does that automatically in it's working program monitor space so what you see should be what you get for broadcast.

Your scopes tell you the levels of luminance.. 0 is black and 700mv is white.  It's based on an IRE scale ( old school TV land ) where the voltage of the electons hitting the back of a CRT determines the brightness, etc.

That's the 'normal range' of luminance. Sometimes an occasional 'burst' of closed black ( below 0 ) and really blown out white ( above 700 ) can be accepted... but those are like short lived.

In YOUR scopes, that would be translated to maybe something different ( TV safe ).. Other people here know more about this stuff than I do, but that's the basics...

P.S. you are probably wanting to export 25 Psf … progressive segmented frames .. which is maybe the codec you have selected... don't know..

Others will chime in. I'm sure there are tons of people shooting with their telephones who go to broadcast.