Yes you can re-use a miniDV tape but as you re-use them you have a high chance of getting glitches in the audio and/or video. Most people only use a miniDV tape once. These errors are called "drop outs" to my knowledge.
I hear everybody says that you can edit minidv tapes and then make a dvd and then watch it in a dvd player. My question is this, assume that I dont need editing. Then, is the quality of a dvd made from the minidv tape through one's computer is the same as that of the quality of a dvd from a dvd comcorder? Or is the dvd made from the minidv is better? Could some one please answer this. If there is no differnce, then I might as well go for a dvd comcorder, because I am not going to edit either way.
The other question I have is this. If I copy my recording from the minidv to a cd, can I reuse the minidv for recording again with out suffering quality? Or a minidv can be used only one time?