the problem you have with the corrupt video part is that you extracted the ISO file. Your best way would have been to use IMGBURN (google it, its a free burning program). when you run the program select "write image file to disc" and select the original ISO file, pop in your DL DVD+R, set the write speed to 2.4x and burn the disc. If you need it to fit onto a DVD-5 (Single layer) then just run the whole thing through DVDShrink. yes you will lose some quality but it will still be better quality than converting it to mp4 then back to DVD