something these others haven't touched on is the difference between video and photos. its the same stuff, just different purpose.
-when filming, you want your shutter speed to double your frame rate. for example, if you're filming skiing at 60fps, then u want ur shutter speed to be around 1/120. this is what the human eye basically sees. 24p, 1/50 shutter, etc.
-your aperture, or f-stop, is how much light ur lens lets into the camera. the lower the number, the more light coming in. the lower the number the more depth of field u get, which can make focusing tricky. the higher the number, less light, but less depth of field so almost everything is in focus.
-iso is just the cameras way of digitally brightening what its seeing. keep ur iso as low as possible to avoid grainy noise in your footage/pics. the higher the iso, the lighter the image will be, but it hits a wall where ur image becomes unusable because the camera is just making up the light digitally.
when i film skiing, ill set my frame rate and shutter speed and leave them. ill play with aperture to get the lighting right, and if its dark, i might turn the iso up a little.
when i take pictures of golf, i set the aperture wide open so i get lots of depth, then crank the shutter speed until the lighting looks good in the shot. this makes freezing the moment in time great because the shutter is lightning fast.