Why would an executive know deep technical aspects such as content algorithms.
These things are not that complicated for software engineers and I am sure they understand it
exactly

They collect data points and identify patterns. It is not complicated to a developer.
e.g.
1st User is 17 year old female from Utah that likes anime and k-pop, spends an average of 2 minutes on a page, replies to dms within average 3 minutes etc
They collect millions of this data and then identify averages, patterns. Documentary might be

to people that aren't developers but this is normal to increase user engagement.