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I've been to Cantius in Chicago many times. In fact, it was the first place I was exposed to the TLM and it changed my life.
It's a very beautiful church and has a magnificent reliquary, statues, etc.
It also has a wonderful choir and hosts classical music concerts. 
I will let others speak to the question this poster raises. 
I will say however that all the indult masses in the Chicagoland area under Cupich and his buddy Hicks, who left for NYC, 
aren't likely to be around for long. The sermons in these churches are completely stripped of anything that pertains to
the culture surrounding us, because these priests know that any criticism of Cupich's pro abortion friends in politics, the sodomite
community, the corruption within the Church itself will result in them being shut down immediately.
For all the beauty of the services I simply can't stomach being una cuм with Cupich and Prevost. 

  

Can anyone reasonably watch Videos like these from Saint John Cantius (listen from 40-55 minutes at least, for the Meat of the Mass, the Offertory, Roman Canon/Eucharistic Prayers etc) and somehow tell me the NOM is not valid or licit?

Absolutely.  They put lipstick on the Novus Ordo pig.

Problem is precisely with the Offertory, and no amount of smells, bells, incense, chant, vestments, Latin, and Gregorian chant can make the heretical / blasphemous nature of the Bogus Ordo "Mass" go away.

Infiltrator Conciliar heretics replaced the Catholic Offertory with a Jєωιѕн table prayer.  Catholic (Tridentine) Offertory has the priest offering up the Spotless Victim in reparation for sin, whereas the Conciliar garbage says that the priest is offering bread and wine, the work of human hands, and fruit of the earth.  That's almost verbatim a Jєωιѕн table prayer.  Our Lord told Marie-Julie Jahenny that the Jews were behind the New Mass that was odious in His sight and contained "words from the abyss", which undoubtedly refers to this blasphemous replacement of the Catholic Offertory.

So, the Offertory is precisely what sets the intention of the entire Mass, since ... simply repeating the words of Our Lord could be done for any number of reasons, from simply re-enacting it and repeating the "institution narrative" (as the Modernists call it), just as a "commemoration".  It's precisely the Offertory which disambiguates different possible interparations of what the priest actually intends to do during the Canon (aka "Eucharistic Prayers" or "Anaphora").  In the invalid Bogus Ordo pseudo-Mass, it explicitly states that what is happening there is an offering of bread and wine.  Invalid.  Period.

But thanks for weighing in with the lies, Nishant, since you gave me an opportunity to expose the intrinsic invalidity of the Bogus Ordo.

Interestingly, recall the punishment God gave to Adam after his sin.  God cursed the earth in his work.  So , the fruit of the EARTH, the WORK of human hands, i.e. the earth in his work, is CURSED by God, and so the Conciliars offer up the curse and punishment.  Interestingly also, while Abel offered up a Victim (blood sacrifice), what did Cain offer?  Cain offerred the "fruit of the earth".  God rejected his offering of the fruit of the earth.

Run along now, you Conciliar heretic you !