I have some mpeg-4 video files of a recording of an old TV series, which comprises eighteen episodes. At the moment I have all of the episodes on a USB memory stick and by sticking it in my BWT850 or TV I can select and watch what I want, and I can also copy them onto the HDD of the BWT850 but If I copy them to my BWT850 I cannot watch them at the same time as something is being recorded. I decided to burn all of the files onto a DVD and use that to watch them using my BWT850 but the device didn’t recognise the files and said that there weren’t any present. Is there some way I can save the files to a DVD, so I can play them on my BWT850? I have both a PC using Windows 10 and an iMac using MacOS High Sierra.