This looks really odd. Flooding left a garden path underwater in Brazil, and the water is so clear you can see every detail.
A machine translation from the YouTube page says,
Faced with the repercussion of the video released on February 15, in social networks, in which appears a submerged track, we would like to pass some clarifications. The fact really happened at the Rio de Prata Ecological Recanto (Jardim-MS) on February 02 and was recorded during the monitoring carried out by the tour's Waldemilson Vera. When it rains a lot, the river of the Silver runs of slower form, causing its damming, thus increasing the water level of the river Olho D'Água. Despite the flood, on the day the video was recorded the waters of the river Olho D'Agua remained crystal clear due to their conserved ciliary forest and being inside a Private Reserve of Natural Heritage - RPPN, a type of Conservation Unit. This was a rare episode, and by the end of the day the river had returned to its normal level. We would like to inform you that on this date the tour operated normally until the 1st stretch, which, although it is also above normal, all the tourists left satisfied because they experienced a different and special day in the attraction!