I didn't watch the video, but one thing caught my eye:
Dr. Rex explains how he started his journey to Blockchain world in 1991
Is this accurate? Did the blockchain world even exist back then (in 1991)? I can see from his biography that he has 25 years of experience in the infocomm world, but this doesn't mean that he has so much experience in blockchain technology.
In any case, I wouldn't take these prediction too seriously either.