Help me please !

[Belva]

How can i get best quality from my videos ??
My configuration:
PII 350 Mhz overclocked 466
256 MB ram
HD 8,6 GB
Matrox Marvel G200

Another question:
why when i output my video to TV/VCR the image size is different from original ??
(original size 352x288)
Thanks