A lot of shelters and lean to work great if your in the forest, but if you find yourself in a swamp or desert it's a bit more difficult. I absolutley HATE swamps, hard to stay dry, filled with a ton of biting, stinging insects, and usually everything that lives there is meaner than hell or poisonous.
I don't know any videos for this shelter but it a high stand shelter. Basically get 4 poles long enough to stand 4 ft out of the water around you, and place them far enough apart to make a comfortable shelter for you and your gear and other people. Lash four more poles horizontally about a foot above the water level and another four towards the top. Place smaller sized poles across both sets to create a surface to lay on and to cover your shelter. In a swamp you can use branches and leaves to place over the top of your shelter to help keep water out.
This helps keep you out of the water, gives you a chance to change out of wet clothes, and you can also build another, smaller version of this, lined with rocks and mud to build a fire on, or if you build your shelter large enough you can build a fire on it but I would suggest against that unless you absolutely have to.
