I copied all my video recordings to dvd disks by hooking up a stand alone dvd recorder to my tv and video player.
They make exact copies with no discernible diminishment in quality. My dvd recorder has a hard drive as well so a certain amount of editing - cutting out unwanted bits - is a doddle, before 'archiving' to removable disk.
If you want your videos enhancing rather than simply reproducing, then perhaps you should look to the professionals who may be able to correct any faults / distortions and so on. But this will prove expensive.
A dvd recorder costs from around the �60 mark to several hundred. However, it will prove worthwhile especially if you buy one with twin digital tuners as a future replacement for your video recorder.