What DVD burning technology allows for 50GB storage on a single DVD?

HDVD-9 is the closest and the most recent I've looked at. Probably your best choice. I got all 4 seasons of Teen Titans, all 50 eps of Yu-Gi-Oh, all 95 eps of Rurouni Kenshin on one DVD using that program. That's 42gbs right there. But there may have been a more updated version I have to look.