That video was actually made by one of the members of this forum, so he may eventually show up to share more details of his experiences with the 605 Poly, but in the meantime I am going to be bold by commenting on a revolver which I admittedly don't own, so take this for what it's worth...
In my honest opinion, I don't think that the Taurus Polymer frame revolvers were designed to be shot very often, but rather shot only when necessary, and even if I'm wrong in that assumption, then at the very least I'm going to say that regardless of intentions, I don't think that the Taurus Polymer frame revolvers are up to the task of handling a steady diet of full power .357 Magnum loads.
Polymer may work well as the frame material of semiautomatic pistols, but it has yet to prove itself in revolvers, and I have my doubts that it's up to the task, especially when it comes to high pressure Magnum cartridges.
That being said, I think that the Taurus 605 Poly will hold up just fine so long as you don't fire a lot of barn-burners though it and favor .38 Special for fun at the range, reserving .357 Magnum self-defense loads exclusively for self-defense.
I could be wrong, but I think that Lion Quest Fitness liked to run hotter ammo through his, which could have been a contributing factor to how quickly it was wearing out and how the screws kept shaking themselves loose.