The term popular vote is very deceptive. If the only vote that mattered was the national election of the chief executive, it might be useful. But if voting is viewed holistically, as in local, state, and federal, there is no such thing as a popular vote. The vast majority of US citizens do not fully participate, and it is a large minority that participate in the national selection.
Further, many people love to point out Hillary gaining more popular votes in 2016, but they never seem to point out that this was almost solely due to California. Subtract California voters, and the competition's outcome makes perfect sense. This is precisely what the Electoral College was built to do. Just because 1 quarter of the entire nations social welfare beneficiaries decide to congregate in one place and all vote the same way does not mean they deserve to pick the president.
I have to wonder why the video didn't even touch the genesis of the NaPoVoInterCo. Just glancing at the map at the top of this link will tell you everything you need to know about both the politics and the purpose of this scheme: https://en.wikipedia.org/wiki/National_Popular_Vote_Intersta...
This is a plan to turn the US into a one party state. This guy explains why that is not only a good thing, it is inevitable. After you read his piece, you should look up his net worth and where and how he lives: https://medium.com/s/state-of-the-future/the-great-lesson-of...
I fear there are dark times ahead. At least CGP Grey will be very entertained as he watches us collapse from London, a city completely inoculated from demographic shift, political infighting, and terrible consequences for poor decisions.