Mac OS Screenshot does not Allow DVD Player to Appear in Captured Region

This is the first time I have ever taken a screenshot and had the Mac OS manually hide an area of the captured region (in the case, using: “CMD+SHIFT+3”; takes a screenshot of the entire screen).

I was watching the first [of our generation’s] Sherlock Holmes on DVD (using Mac’s built-in DVD Player) when I took the screenshot, see below

Mac OS Hides DVD Player App Region