Daewoo DVD VCR Combi Issue

I recently purchased a Daewoo DVD VCR Combi to copy old videos to dvd.

I copied the VHS to DVD no problem at all.

The problem is I can only watch the DVD’s on the Daewoo machine, not a PS3, PC or any other DVD player.

Is there anyway to watch them on my PC? What codec are they recorded to DVD in.

Anyone know of a way to get around this?

Any info greatly appreciated,

Thanks

I guess you have to finalize the DVDs.