Most US "companies" which hire tech talent, aren't looking to scale up "businesses" which are cashflow positive. These "startups" are effectively bankrupt relying entirely on their current runways and their bi-annual VC injections.
Like they said in the video, Canadians for better or worse are inherently more risk averse than their American counter parts. Even more appropriately the entrepreneurs which stay in Canada vs move on faith to the bay, are tautologically less risk averse.
To look at this from a different perspective, Canada may just be living with a sustainable tech sector.
Its like watching/envying your neighbors as they come home from their third sunny vacation, this year, to their over sized house and driveway with two Mercedes. But that envy would quickly disappear if you ever got a chance to look at their books. You'd see they just took out a second mortgage on the house, when they could barely pay for the first one, so they could continue to finance their cars. Meanwhile, they still have so much additional debt accruing it really should be criminal.
I really wouldn't know though.. I'm a risk averse Canadian, whose just sorta hoping I've found a sweet spot on the risk-reward line.