Certain DVD member zoom in wonder

I been looking at Orinocco Flow off of Emerald and noticed only Susan is zoomed on during the iconic each individual solo response moments.

Now I don't know about for other DVD's, I'm just curious or was it based being only on this venue recording.

Sometimes the selection they make to who they zoom on in Specials during Group Song moments is interesting.

Can you imagine if they have everything every member recorded but then they simply select what's the best for the DVD creation!