I agree with what has been said about the other video. Some good things, some bad. I think Kara summed it up pretty well.
I bought my pvc cages because I do enjoy being able to see my animal and I like how they display over a rack, but recently I got my first rack for my young bloods.
Now having used both I think my personal preference is the rack for bloods. The main reason is I like to keep them on a deep layer of mulch so they can burrow. I Feel they prefer this over hides. The problem with the mulch and the cages is even though the cage has a good size lip on it my big girl required such a thick layer of substrate that it would get pushed up past the lip and fall out when I opened the door(I have fold down doors). Also when I wanted to take her out she would drag her tail and usually knock out a good deal of mulch each time.
I now keep her on paper with a big hide. She doesn't seem to mind. She is well behaved, eats everything, and shows no sings of stress. I would just prefer to keep get on mulch.
In a identical cage I have a six foot BRB on a thinner layer of mulch. Even though he roots around the layer works out just fine and I really enjoy having him in the cage. I think it is great for him.
The reason I'm enjoying the racks is I can have the think layer of mulch and when I remove a snake I can lift it straight out and all the mulch stays in the tubs. I'm trying things out for now and have them set up with a big water bowl, hide, and a corner of deep mulch. One enjoys the hide, one the water bowl and hide, and the other the mulch. Eventually they will be on mulch alone but I didn't want to take their hides and give them new homes. I don't like to change to much to fast.
I know mulch falling on the floor is a pretty small complainant but I just don't like it. I have also enjoyed the ease of cleaning a tub vs. cleaning the cage.
One thing I did find strange about the video is his choice to use bloods to show off arboreal cages. It seems to me I would want to display the type of animal the cage was intended for. On the consumer side I would much rather see bloods in the type and size cage he would recommend so I could get a better idea of what I was buying. Maybe he doesn't have any arboreal snakes, I just thought that was alittle weird.