Watched the first part of the video, where the packet was thrown into a pool of water, absorbed fluid and which was then strained and consumed. I can only say that on numerous occasions (in remote settings only, not near civilization)I have drunk directly from much worse appearing ponds that that with no subsequent ill after effects what ever - my strategy being that bad stuff in that water might affect me after a week or so, but by then I will be back in town if I hydrate now. There were Arizona arid conditions and I was quite dehydrated.

It is always a good idea to drink water that is non-toxic, but if push comes to shove and you can't disinfect for some reason, drink up. First things first...