I've still got the final 15 minutes to watch and still adore it.
Since you're craving suggestions:
1. An opportunity to smooth out the viewing experience might be to shorten the 5 second blackout during transitions. Is there a reason for those in this phase? They are slightly disruptive. Maybe even remove them and use a basic transition from the closing bumper sequence into the next segment.
2. White text for subtitles is hard to read in about half of the scenes where they appear. Is it possible to add a darkened slightly opaque rectangular background layer around the text?
3. Are the subtitles necessary? Since it's on YouTube, perhaps leave the subtitles out and make them an option via YouTube's subtitle functionality.
I'm really fascinated by the b-roll footage, establishing shots, etc. Without those, this wouldn't feel the same way. I don't even comprehend how you would plan out or think of something like "get out of the car and film me talking to the guy selling sim cards". So awesome.