This is strictly speaking a computer forum but I will give you what help I can. As long as the dvd recorder you have has a tuner then the answer is yes you can. Even if it doesn't have a tuner then you can record through a SCART lead from say a digi box and watch normal TV.
My setup, cannot afford SKY so have freeview.
Aerial comes into the freeview box then via SCART to the DVD recorder then via SCART to the AV input on the TV, also have standard TV aerial connection running to TV from the freeview box.
I can watch freeview or watch normal TV as the dvd recorder can either record terrestrial TV 1,2,3 or 4 or via the SCART can record freeview. Whilst its doing this I can watch the terrestrial or whatever the freeview is on. I cannot watch one freeview channel while recording another I would need a dual tuner freeview box to do that.
I hope this helps somewhat.