Hi,
I don't do anything more complicated than VHS to DVD, and haven't used anyone who does. But do warn your friend than "burned" DVDs (i.e. home-made DVD-R's etc, including those made by firms like the one you mentioned) aren't a panacea for video archiving. People have found they can last anywhere from only a few weeks

up to several years, up to some manufacturers now claiming they'll last 100 years! (If anything would still play them then!!)
The dye which in effect carries the data (optically) on the disc starts to break down over time, depending on the quality of the disc, how much it's handled, and how it's stored. And just one tiny flaw on the disc
can sometimes make the whole disc unplayable, in which case all its contents
may be lost!
But don't worry too much. For important (archive) video, just make sure the original DVDs you have made are done on the best quality discs (Taiyo Yuden, TDK, Panasonic, Sony), and always have at least 1 if not 2 back-up copies of each one, stored away in a dark dry place. Then check them every year or so to check they're still working. As soon as one starts to fail, you'll hopefully still have 2 working copies of the same disc, and then make another back-up or 2 from one of those, and keep doing this sort of "rolling back-up" to make sure there's always at least 1 or 2 working copies. You could always do another copy onto another medium (VHS tape??) too, just to be sure (although that's obviously lower quality)...
And within another 10 years, we might all be putting all our video to store on a multimedia centre hard disk (or some other storage technology), either in the home, or online, where automatic back-ups will be cheap and easy to do. But in the meantime, DVDs are fine (I hope!), if you're aware of their shortcomings.