there is an interesting context for that video, those tolerances and limits (such as nitrite suppression of the cycle) only apply when you are trying to speed cycle, ie add fish within days or perhaps the same day of a setup.
if you have 30 days, then any combination of ammonia and bottle bac you add, or import (anything wet brought in like the caribsea live sand is ready) will be cycled. You can't stop it from happening in 30 days, if you have the time. We have threads ready that show very detailed testing of cycle bacteria out to 8 ppm, far beyond limits from the video for actual aquarium bac, and no harm to the actual speed cycle process + the one where we just wait 30 days.
the most handy takeaway in any cycling thread is that if you have 30 days, you cannot stall it. Approximations of bottle bac and ammonia and water always lend a fully cycled tank at day 30, thats handy because it means you cannot mess up a cycle
its such a reliable timeframe that testing isnt required for any param. You can input rough guess amnts of ammonia, dump in some bottle bac, wait a month, change the water, refill, and it carries an instant fish bioload plus feed, the definition of a completed cycle isn't a test kit its the ability to carry fish loading without death even after a 100% water change. An uncycled system will die overnite with fish, can't even go 12 hours.