
I got them to preview videos over 25 gigabytes and they do a great job. However, you must keep the surface of the disc clean otherwise you will get validation errors and hence playback errors. Otherwise, be prepared for long waits as recording 50 gigs at 2X (or less on some burners) can take close to an hour.

High-Quality Philips 16X DVD+R Media 50 Pack π - White Inkjet Printable - Versatile Cake Box Packaging (DR4I6B50F/17)
10 Review

Sony 50DMR47SP DVD R 4 7GB Recordable
10 Review

Verbatim 4.7GB DataLifePlus DVD-R 50-Disc Spindle: White Inkjet Printable with Hub Printable - 16x Recordable Disc (95079)
10 Review

π₯ RCA Hi-Fi Stereo Videotape (10-Pack) - Limited Stock by Manufacturer | Improved SEO
10 Review