Tell me please why the speaker left out an article after the phrase speaking of in the following sentence. Is it from Crash Course Big Hisory? It is 2 minutes and 32 sec.

When a question is opened by tapping the zoom the desired box with a pen, the answer is entered while the question is opened. What does Big History do. Apparently zoomed out the Earthrise. This is one of the most famous photographs of all time. When will you view it and what will you see it? How do you view it?

Why didn’t the speaker use the word before zoomed out or not say speaking of zooming out?

Why we are here now?