Yea, The audio and video becomes clearer after you clean that dust off.

I watched probably a dozen different videos, but that simple cleaning with a rubbing alcohol dipped q-tip, squeeze out excess alcohol so it's wet but not dripping, worked best at cleaning off audio video.

Then frame rate and resolution, and Bob's your uncle.

Oh, I'll add, I did try literally every single frame rate resolution and every single checkbox and option in OBS studio and handbrake, and none of the odb options made any difference that I could tell from the default.

I did notice after I digitized the video with OBS that handbrake made it incredibly simple to encode it in a different format if you want, because I wanted mine in a simple MP4 format.

Handelbrake does have a cool filter set built in that alleges to reduce noise, and I did use them, let me see what my custom preset says.

Disclaimer, I believe all the defaults will do exactly what you need. If you just clean the heads and stick to the defaults of 480p and the ntsc or pal frame rate.

But if you do want to try denoising everything, I did think that by encoding my directly digitized videos in 480p at default resolution and then selecting all of the filters except for colourspace in handbrake, The videos looked like 5% better

Haha, so not a crazy amount, but if you want to experiment, everything default for the digitizing itself, and then do all of the editing within program like handbrake.

Attached picture is an example of the filters I used in handbrake.

Colourspace distorted the colors pretty bad. But the denoising and sharpening was pretty cool by a very small amount.