Can't see the video. What we use is 65 gallon drums and other troughs set into the ground for ground heat. These are connected in series down the mountain through our pastures and fed from the top by springs. This provides running water year round. The drums and wind breaks provide a micro climate and wind block to help keep the water from freezing even in the winter, most of the time.
If you don't have steep land and springs then you could setup waterers that have deep pipes drilled into the earth to bring up heat and a flip lid on the top that pigs can lift up to drink from the waterers.
I tried a lot of different nipple waterers but they don't work for us as they clog up with silt too easily and half our year they freeze up (USDA Zone 3).
Water is very important for pigs. Check it daily.
See here for some photos:
http://www.sugarmtnfarm.com/?s=waterers
-Walter
in Vermont