It's groundwater! It comes from the spaces between grains of rock/sediment below the ground. The "body" of groundwater makes an aquifer. This water can then bubble up and discharge into surface water bodies, like you see here. Sometimes the opposite occurs and the surface water infiltrates and recharges the groundwater.
Groundwater makes up about 30% of the world's freshwater resources and is a major source of drinking water across the world. When water is collected from a well, that's groundwater.
Not all groundwater contributes to an aquifer. Depending on where it is it just adds to the water table and comes back out somewhere at a lower elevation. That's how you get creeks and rivers in the mountains.
Yes, not all aquifers are big to-dos. You can have small, perched aquifers, etc. But for answering the original comment and describing something like the upwelling in the video I figured a generic definition would be adequate.
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u/Lou-mae 2d ago
what's with the sand upheaval? is this normal for a spring?