A person is in the woods speaking on what he believes has change.
A man is outdoors and explaining how a sieving process is done while a woman uses a hose to clean something in a large wooden container.
A  man is in a forest with a woman showing how they make a filling look black.
A women sifting through gravel while a man narrates the process.
a man and a woman outdoors cleaning a dirty grill with a hose
Man in green shirt instructing how to filter through sand by using a pit and water.
A man and woman are outside, the man is talking while the woman is watering down a container of dirt.
Two people are wetting material in a trough to prepare it for something.
A man narrates as a woman demonstrates watering with a hose.
a man is describing a process while a lady uses a hose to water soil