Interesting, I was just listening to Young Lean's Kyoto when I decided to watch this video.
I agree that there is no science to the #dualities at play between beats and lyrics. Personally in my mind I might like to think that I'm a 55 lyrics/45 beat guy, but once I put a track on the numbers rapidly shift from one direction to another, throughout the track.
A horrible beat can ruin great lyrics, just as horrible lyrics can ruin a great beat; how many times due we lament the idea of "wasted beats." I'm God by Lil B comes to mind. More recently, fuckwithmeyouknowigotit by Jay comes to mind; thank god Ross gave us a decent version on Mastermind.
Remember the early aughts brehs, specifically the underground shit of the time? How many of those tracks had trash beats with inaudible bass/drums, under lyrical miracle rapping. That shit wasn't hot. There were some acts that shit together, production wise (Dilated Peoples, Soul Position, Brother Ali, etc) before Little Brother showed up, but there was plenty of SMH worthy stuff (Slaughterhouse's various rappers' solo careers).
One thing the video didn't mention was flow and presence. Sometimes both can overcome bad or forgettable lyrics. Love Sosa, I Don't Like, Pretty Boy, Young Lean's Kyoto, and plenty other tracks come to mind. Some shit just...works.