PAL 4x3 resize for interlace would be 768x576. You cannot resize the x480/x576 value, or it will break interlace.
PAL resize for deinterlaced is better as 720x540.
NTSC still 640x480.
All video tapes have
- chroma noise - fixed with line TBC in VCR, LSI chipset (for DVD recorders), Camcorder Color Denoise (CCD) filter in
VirtualDub (for captures)
- overscan noise - mask with black, 2-pixel increments, and it re-centers remaining image
- grain - generally only a mild NR is used, so as low value Temporal Smoother (
VirtualDub)
That ignores all color issues, which all homemade camcorder tapes tend to have.