I’ve seen a few videos from this Youtube channel and the guy talks sense (to my mind) with a pragmatic view. He’s supportive of using a trainer but offers words of advice and fully supports the brutal intervals favoured by sadist in Chief coach Chad ( 
) Pro/Con of turbo-trainers
Pertinent with winter creeping up on us in the N.hemisphere.
An old video, and lacking in detail or what I see as better suggestions of solutions.
Rocker Plates and trainer motion at the time of posting were relatively unknown. Using rollers or the Kinetic Rock and Roll trainers are the notable exceptions that were available at the time.
But there was an overall lack of knowledge about motion solutions and the real benefit they offered. We have seen a large change in that over the last to years and now have a wider range of solutions (most via DIY or very small vendors).
Whether people have tried them or now, rocker plates and the like are more known and seen but many adopters to address many of the issues we see with rigid trainers.
He touches on the difference in power output inside vs outside, but does little to offer any solutions.
We know the common culprits are often insufficient cooling, lack of motivation, and the physical variation in demands.
Cooling and motivation are relatively easy gets, and adding motion is another option.
Trainers have improved greatly and can offer more “road-like” experience in many cases, so that addresses another concern.
It’s funny, but I get the same “warning” vibe from him that we saw from the FastTalk podcast on indoor training (my prior critique of that episode). They both point to the “dangers” and really don’t offer practical solutions that are within easy reach.