I would like to be able to convert video to a DVD format I can play on my home DVD/TV. Is that VOB?

So many video converters out there, but none that I have yet found will allow me to convert a video I have downloaded (eg from YouTube etc) and play it on my home TV or to give it to some computer-illiterate person who just wants to watch my video on their TV.
I am not sure of the format - if I knew it all I would probably not need your video converter! But I think it might be a VOB file that I need? I don't mind loading up Nero or whatever to write the DVD, but I need to convert the input video file to something suitable.