The video is 7 minutes. The author does a good job of demonstrating how to reconstitute the compressed tablets.
https://www.youtube.com/watch?v=dP9U7cuzpuYThe product, a compressed cellulose pad, equivalent to about two toilet paper 'squares'.
Pro's
Small volume, light weight
Stronger than normal toilet paper, even when wet
"biodegradable" so it can be buried or burned, as necessary
There are other uses for these, beyond their use a sanitary wipes
You can carry the equivalent of a roll (roughly) of TP in a pocket sized bag.
Con's
A box of 500 tablets is quoted in the video as costing about $30 Canadian.
Water is needed to un-compress the tablet of cellulose
You may need to train yourself to use a limited amount of TP for sanitary wiping. Of course you could uncompress several of these tablets, but why waste a limited resource when you can learn to conserve.
Other uses:
I could see this being used, still compressed, as fire starters, with some Vaseline or alcohol. If you uncompress these with a little water, then let it dry in the open air, they would make good fire tinder.
Some thoughts; you might be able to make a press and produce your own tablets from toilet paper. Remember that these tablets are stronger than regular toilet paper, but it might be cost effective to make these at home...