Remove noise in video post production
The parasites you talked about is called noise. The setting you can change to get less is called the ISO. It corresponds to the old ASA value we had before the digital age.
We can't see a thing, we can only see light. That's the way the universe is built up. Same with the camera. It sees the light reflected off surfaces. So white objects reflects all light and dark objects no light. And absence of light, as you know, means darkness. Where it is dark it has to &quot;work extra hard&quot; to figure out what's actually there, because there is almost no information there given from the light. Therefore you will get some noise. A better camera will produce less noise.


Turn down the ISO as much as possible without compromising the aperture or &quot;shutter speed&quot; you want.
Remove the noise left in post.


It is also no problem to edit it away in post on your computer! The only compromise is that you will get smoother edges and blurred images the more noise you remove. I once saw a movie shot entirely by moonlight. It was full of noise but they removed everything in post!
There are two plugins you can use:


Neat Video's Noise Removal. I've never tried this, but you can use it with Sony Vegas. They claim to be the best in noise removal.

Red Giant's Magic Bullet DeNoiser. I've used this and am very satisfied with it. Does a really good job. I don't know if this works in Vegas, but it certainly works great in Adobe After Effects and Premiere Pro!