Why Elon Musk is really building Starlink

I loved the positivity of your first video and so don't want to rain on your parade, but....
there are so many things wrong with what you are saying here... where to start ..
firstly you could try to take a look at commentators like common sense skeptic or thunderfoot on YouTube regarding Musk and starlink among his other scams.
Both of the above give excellent summaries of whats wrong with starlink (and any other similar projects) but some points to highlight are 
1. as you mentioned starlink are placed in low earth orbit, which are the most crowded orbit - placing 10s of thousands of satellites in this obit may well lead to the Kessler effect, where there is a run away cascade of colliding satellites leading to a low earth orbit filled with space junk.
(Musk has no solution to this and does not care)
2. due to being in  a low orbit the satellites have a much reduced life expectancy and the economic model for the rate that they need to be replaced does not work.
3. Musk has not given Ukraine free access to Starlink. He is busy milking the American government and others for the cost of this.
4. Satellite internet may never out perform cable for the majority of people, but that does not mean that everone else need be abandoned to the sharks like Musk and Bezos ... they deserve better and you need to do a little better research before being a cheerleader for the worst solution

There is much more but I have better things to  do