As i dont have a capture card, can I capture a run by filming my monitor with a camera?

So capture cards happen to be so very expensive, and defiently out of my price range at the moment. Can I capture (verifiable) footage using a camera recording my monitor? Ive heard its game dependant, so i wanted to check before I do any runs! Also, if the answer to the previous question was yes, does this require sound if this is the case its no problem, but there would be a lottt of background audio from not using a capture card